Find 10 practice problems for solving one dimensional equations

Solve the following unary equations.

x+3x=-16 3x+5=4x+1

9-3x=5x+5

2x+3x+4x=18 13x-15x+x=-3

1. Solve the equation; ①5x+2=7x-8②4x^2+4x+1+4x+2+1=0

2. Fill in the blank There is a large bundle of wires of uniform thickness, and now its length is determined, so 1 meter of wire is drawn from it, and the mass of the store is a, and the total mass of the rest of the wires is b, then the total length of this bundle of wires is ( ) meters.

Xiao Wang walks on the highway at a speed of 6 kilometers per hour, a car with a body of 20 meters comes from behind, and drives past Xiao Wang's side, and the time of driving past Xiao Wang's side is seconds, then the speed of the car is ( ) kilometers per hour.

3. What is the annual interest rate of 100 yuan as a 3-year regular education savings, if you can get a total of interest when it expires, then what is the annual interest rate of this 3-year regular education savings.

1. When the general ship is sailing in the water, when the known current speed is 10 kilometers, and the speed of the ship in still water is 40 kilometers, how many hours does it take for the ship to sail back and forth between A and B? In this problem, if the required time is x hours, what other conditions do you need to add to be able to solve the equation? Supplement the conditions according to your idea and solve the parallel equations.

2. A factory planned to produce a batch of parts in 26 hours, and then due to the production of 5 more pieces per hour, it took 24 hours to not only complete the task, but also produce 60 more parts than the original plan.

3. The sum of the unit price of the two commodities A and B is 100 yuan, because of the seasonal change, the price of commodity A is reduced by 10%, and the price of commodity B is increased by 5%, after the price adjustment, the sum of the unit price of the two commodities A and B is increased by 2% compared with the sum of the original plan, and the original unit price of the two commodities A and B is obtained.

4. The car walks 28 kilometers per hour when going uphill, 35 kilometers per hour when going downhill, when going, the downhill is 14 kilometers less than twice the uphill road, and it takes 12 minutes to return to the original road than when going.

5. A. A total of 120 people from two groups have traveled to a scenic spot. The scenic area stipulates that groups of more than 80 people can buy group tickets, and it is known that each group is 20% cheaper than individual tickets, and the number of people in both groups is less than 80 people, and the two groups decide to buy together.

Group tickets, a total discount of 480 yuan, how many group tickets are there?

pieces (point: set the original plan to produce x parts, then there is, solution x = 780).

yuan, 80 yuan (dial: set the original unit price of commodity A x yuan, then the original unit price of commodity B is (100-x) yuan, then (1-10%) x + (100-x) (1 + 5 ) = 100 (1 + 2) solution x = 20).

km, 72 km (if the uphill x km is set, then the downhill is (2x-14) km, then: x=42 2x-14=70).

Yuan (Dial: set up group tickets for each x yuan, then individual tickets for each yuan, then have.)

120 -120x=480 solution: x=16).

Team A has 32 players and Team B has 28 players, if you want to make Team A 5 times the number of Team B, how many people need to be drawn from Team B to Team A?

(1) Go with your back, that is to say, when the two meet, the distance of the two people adds up to exactly 400 meters in the length of a circle, and the two meet after x seconds.

9x+7x=400

x=400/16

2) Walking in the same direction, that is, A who runs fast should overtake B who runs slowly, and then go around one more circle to catch B, that is, when the two meet, A's distance is one lap longer than B's.

9x=7x+400

x=200

x+2=6 then x=4 150(x+12)=240x then x=20 2x:3=6:5 then x=9 5 5y+8y=12 then y=1

x-2=6 then x=8 2x+3=x-1 then x=-4 6x-6=9x then x=-2 8x-2=7x-2 then x=4

2x+4x=0 then x=0 3x-4+2x=4x-3 then x=1 7x-6=-5x then x=3 2y=9 then y=2 9

x 2=x+6 then x=12 then x= x+9=18 then x=2 5 2+3y=5 2 then y=0

3x=63 then x=21 x 2+1=x then x=2 4z+1=8z then z=4 8+x+x=6 then x=-1

1.[(x-5)÷2-10]÷8=1

2.[(x+8)×8-8]÷8=8

11 ) 3 ( 22 − 2x )

3 ( x − 5) =6x + x − 1 )(3x − 4 ) 8 ( 4x − 9 ) 2 ( 2x + 1 )

x − 2 ) = −

3x 2 ) 4 ( 4x 3 ) 1 hard bar, if I can!

It's hard enough, New Oriental, I'm a New Oriental teacher, if you don't know how to find me!

1. 2(3x+5)+15x=2x

2. 3x-4x+158=851

3. 2010x+2009x=-1

4. 2(20112009+20112001)+x=20112010

There are a few questions for the landlord

It's all my own, so it's hard enough