Grade 5 Two Equation Applications, Math Equation Grade 5 Two Equations

1。Set the badminton ball to buy x, then the small leather ball to buy 160-x.

x=40.

Therefore, 40 badminton balls were bought, and 120 small leather balls were bought.

2。If the distance between the two cars is 480km after x hours, then there is.

48*x+56*x+12=480

104x=480-12

x = hours. Therefore, the distance between the two cars was 480 kilometers after hours.

1.If the school buys x badminton balls, there are (160-x) small leather balls.

x=40 so buy 40 badminton balls and 120 small leather balls.

2.Set x hours later, the two cars are 480 kilometers apart.

48x+56x+12=480

104x=468x=

Set feathers x only, skins 160-x only.

x = 40 balls = 120 balls.

Set x hours 12 + 48 x + 56 x = 480 x = 468 104 = hours.

1.40 badminton balls and 120 small leather balls.

1. Set each bag of flour to be x kilograms.

29*90-80x=610

Solution x=25

A: Each bag of flour weighs 25 kg.

2. Set up the purchase of x science and technology books.

3x-48=720

3x=720+48

3x=768

x=256 A: Purchased 256 science and technology books.

Equipped with x mineral water bottles.

So mineral water bottles have yuan.

Cans are one yuan, so 10 is 10 yuan.

So altogether. x=2÷

There were 40 bottles of mineral water.

If you eat x kg of rice a day, you will eat 2x thousand grams of flour a day.

So 7 days to eat 7x kg of rice, 7 x = 14x kg of flour.

The flour is gone, and the rice is still 140 kilograms.

So flour eats 140 kg more than rice.

So 14x-7x=140

7x=140

x=140÷7=20

2x=40 So if you eat 20 kg of rice a day, you will eat 40 kg of flour a day.

Solution: (1) According to the topic.

The distance from Xiaomin to the school is 70a.

Xiaoling's journey to school is 65a.

70a>65a

70a-65a=5a

So Xiaoling's family is close to the school.

5a meters. 2) Stupid shouting of the question.

The equation is s=70a+65a(m).

Substituting a=15 into the equation gets: s=70 15+65 15Answer: (1) So Xiaoling's home is close to the school. 5a meters.

There are a total of 2025 meters from Xiaoling's house to Xiaomin's house.

The can is 2 5 = 10 cents.

Set x water bottles, 10-x cans, and 5*x+(10-x)*10=300

x = 40.

2) Suppose you eat x kg of rice per day, then eat 2x g of flour per day.

The flour is gone, note.

Flour eaten - 140 grams of rice = rice eaten.

Therefore: 2x 7-140=x 7

x = 20 kg.

Every day, 40 thousand rings of flour are eaten, and 20 kilograms of large coarse rice are eaten.

x=, then eating flour is 2x kg.

2x×7=140+7x

x=20 So eat 20 kg of rice every day, so there are a total of 40 socks made such as mineral water steak bottles.

2) Suppose you eat x kg of rice per day (1) Suppose there are x bottles of mineral water.

1.Set: This batch of coal can be burned for x days.

Solution: 1 ton = 1000 kg of the dilemma, then: (1000 Wang Hong let 40-5) * x = 1000, you can get the peerless x = 50

2.Set: On this day, the workers process x pieces of clothing per hour on average.

Solution: (4+3)x=126*

2 then x = 36

Application question: A and B are wide and hold each other, and the distance between brothers is x kilometers.

x/2=x=x-2=3x19-11

x=x open x=

Thousands of simple sail meters.

Equation lead limb:

5x-10+55=285

5x=240

x=48 Fang Huai Shicheng:

43x=3*

x=3*

1.Let the girls be x and the boys will be.

x+x=182/

x = 7070 * 112 boys and 70 girls each.

2.Let the two people be separated by x points.

x(80+75)=1240

155x=1240

x=1240/155

x=8 After 8 minutes, the two meet.

Solution: If the girl is x, then the boy is.

x+x=70

So A: 112 boys and 70 girls.

Solution: Let's meet after x minutes.

80x+75x=1240

155x=1240

x=8A: After 8 minutes of encounter.

1.Solution, if the girl is x, then the boy is the person.

x+ solution gives x=70

A: There are 112 boys and 70 girls.

2.Solution: Because the question is to find how much time to meet, that is, how much time did it take for two people to complete the distance together.

It took X minutes for the two to meet. According to the distance = speed and time, the equation (80+75) x = 1240 can be set

Solve x = 8 Answer: The two met after 8 minutes.

Solution: Set up x number of girls.

x+x=70

There are 70 girls and 112 boys.

Solution: Let the two meet in x minutes.

80x+75x=1240

155x=1240

x=8 After 8 minutes, the two meet.

1. If there are x girls and there are boys. x + x = 70 70 girls and 112 boys.

2. Let the two meet after x minutes, and the time used by the two to meet at the same time should be the same, so 80x+75x=1240 x=8 After 8 minutes, the two meet.

Bounty Points: 0 |14 days and 23 hours until the end of the issue |Asked by: Ming Ming Xiaomei |Report.

A car took part in a rally and traveled 5,000 kilometers in 9 days. It is known to travel 688 kilometers per day on sunny days and 390 kilometers per day on rainy days. How many sunny days were there during this period? How many rainy days?

Solution: There are x sunny days and 9-x rainy days.

688x+390*(9-x)=5000

298x=1490

x = 5 rainy days 9-5 = 4 days.

Formula: sunny days (5000-390*9) (688-390) = 1490 298 = 5 days.

Rainy days 9-5=4 days.

Solution: There are x sunny days and 9-x rainy days.

688x+390(9-x)=5000

298x=1490

x=5,9-x=4

x = 5, 5 sunny days.

Yours managed to be right.

688x+390(9-x)=5000

1 (6 + 3x) divided by 2 = 18 i.e. 6 + 3x = 36, 3x = 36-6, x = 10

2:x— i.e., x=10

3: i.e., 80x -32x-800=0, simplify: 5x -2x-100=0, there is a problem with the third question, how can the fifth grade question appear to the second power, and it is not right, there is no solution.

That is, x=

The first: 10

The second: 10

The third: