7x-7=2x+21

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Solution for 7x-7=2x+21 equation:


Simplifying
7x + -7 = 2x + 21

Reorder the terms:
-7 + 7x = 2x + 21

Reorder the terms:
-7 + 7x = 21 + 2x

Solving
-7 + 7x = 21 + 2x

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '-2x' to each side of the equation.
-7 + 7x + -2x = 21 + 2x + -2x

Combine like terms: 7x + -2x = 5x
-7 + 5x = 21 + 2x + -2x

Combine like terms: 2x + -2x = 0
-7 + 5x = 21 + 0
-7 + 5x = 21

Add '7' to each side of the equation.
-7 + 7 + 5x = 21 + 7

Combine like terms: -7 + 7 = 0
0 + 5x = 21 + 7
5x = 21 + 7

Combine like terms: 21 + 7 = 28
5x = 28

Divide each side by '5'.
x = 5.6

Simplifying
x = 5.6

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