2x+7=7x-21

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


Simplifying
2x + 7 = 7x + -21

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

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

Solving
7 + 2x = -21 + 7x

Solving for variable 'x'.

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

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

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

Combine like terms: 7x + -7x = 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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