-7-7x=7x+21

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


Simplifying
-7 + -7x = 7x + 21

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

Solving
-7 + -7x = 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 + -7x + -7x = 21 + 7x + -7x

Combine like terms: -7x + -7x = -14x
-7 + -14x = 21 + 7x + -7x

Combine like terms: 7x + -7x = 0
-7 + -14x = 21 + 0
-7 + -14x = 21

Add '7' to each side of the equation.
-7 + 7 + -14x = 21 + 7

Combine like terms: -7 + 7 = 0
0 + -14x = 21 + 7
-14x = 21 + 7

Combine like terms: 21 + 7 = 28
-14x = 28

Divide each side by '-14'.
x = -2

Simplifying
x = -2

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