Question

7x = 20 + 4x

Answer 1

3x=20
x=20/3

Answer 2

subtract 4x from both sides: you should get: 3x=20
then divide both sides by 3 and get: x=20/3

Answer 3

7x-4x=20
3x=20
x=20/3

Answer 4

7x-4x=20+4x-4x
(7-4)x=20
3x=20
x=20/3

Answer 5

7x=20+4x

Since 4x contains the variable to solve for, move it to the left-hand side of the equation by subtracting 4x from both sides.
7x-4x=20

Since 7x and -4x are like terms, add -4x to 7x to get 3x.
3x=20

Divide each term in the equation by 3.
(3x)/(3)=(20)/(3)

Simplify the left-hand side of the equation by canceling the common terms.
x=(20)/(3)

Answer 6

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