-77-7x=7x+21

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Solution for -77-7x=7x+21 equation:


Simplifying
-77 + -7x = 7x + 21

Reorder the terms:
-77 + -7x = 21 + 7x

Solving
-77 + -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.
-77 + -7x + -7x = 21 + 7x + -7x

Combine like terms: -7x + -7x = -14x
-77 + -14x = 21 + 7x + -7x

Combine like terms: 7x + -7x = 0
-77 + -14x = 21 + 0
-77 + -14x = 21

Add '77' to each side of the equation.
-77 + 77 + -14x = 21 + 77

Combine like terms: -77 + 77 = 0
0 + -14x = 21 + 77
-14x = 21 + 77

Combine like terms: 21 + 77 = 98
-14x = 98

Divide each side by '-14'.
x = -7

Simplifying
x = -7

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