-
Solution: Remove the denominator, got.
Move the item, got. Merge similar items to obtain.
coefficient to 1, obtained.
x=-593
x+3)/3-x=(x+1)/2+1
Solution: Remove the denominator, got.
2x+6-6x=3x+3+6
Move the item, got. 2x-6x-3x=3+6-6
Merge similar items to obtain.
7x=3 coefficient to 1, obtained.
x= -3/7
-
General solution:
1.Denominator: multiply by the least common multiple of each denominator on both sides of the equation (the term without the denominator is also multiplied);
2.Remove braces: first go to the small braces, then the middle brackets, and finally the braces; (Remember to change the sign if there is a minus sign outside the parentheses).
3.Shift: Move all terms with unknowns to one side of the equation and all other terms to the other side of the equation; The move item needs to be renumbered.
4.Merge similar terms: Equations are formed in the form ax=b(a≠0);
5.Factor 1: Divide the coefficient a by the unknown on both sides of the equation to get the solution of the equation x=b a
Important ways to do unary equation application problems:
Carefully review the topic (review the topic).
Analyze known and unknown quantities.
Find a suitable equivalence relationship.
Assign an appropriate unknown.
Make a list of reasonable equations (columns).
Solve the equation (problem solving).
Test Write out the answer (answer).
-
Polynomial 2 (x-2) is 9 greater than polynomial 3 (4x-1), i.e. 2 (x-2) -3 (4x-1) = 9
2x-4-12x+3=9
10x=10
x=-1Therefore, there is no correct answer for question 1.
2. Question A
-
Solution: Let the speed of the passenger car be 5xm s and the speed of the truck be 3xm s, then the equation is: 18 (5x+3x) = 200 + 280
x=10/3
So the passenger car speed is 5x=50 3(m s).
The speed of the wagon is 3x=10(m s).
-
Solution: Let the truck speed be x meters per second, 18*(5 3+3)x=200+280
Solution: x=10 m seconds.
A: Passenger cars travel 50 3 meters per second, and trucks travel 10 meters per second.
-
In fact, this is a matter of encounter, and the distance is the sum of the lengths of the two cars.
Solution: If one is x, then the passenger car is 5x and the train is 3x
18*5x+18*3x=200=280
x=10/3
5x=50/3
3x=10
-
Solution: If one is x, then the passenger car is 5x and the train is 3x
18*5x+18*3x=200=280
x=10/3
5x=50/3
3x=10
I happen to be the opposite of you. My equations are better. First of all, the unknowns must be clear, and it will not be difficult in the future. >>>More
1.A two-digit number, the number on the municipal party committee is twice the number on the one digit, if the number on the ten digit is reversed with the number on the person, then the number obtained is 36 smaller than the original, find the original number. >>>More
2x-1|+|x+3|=16
When 2x-1 =2x-1 x+3 =x+3. >>>More
1. Solution: 1) Set up a total of x potted flowers purchased by the school, and the number of flowers assigned to each class is equal. >>>More
The original plan was to excavate x 10,000 cubic meters of earth and stone per day. >>>More