-9x-21=-3x-7

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Solution for -9x-21=-3x-7 equation:


Simplifying
-9x + -21 = -3x + -7

Reorder the terms:
-21 + -9x = -3x + -7

Reorder the terms:
-21 + -9x = -7 + -3x

Solving
-21 + -9x = -7 + -3x

Solving for variable 'x'.

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

Add '3x' to each side of the equation.
-21 + -9x + 3x = -7 + -3x + 3x

Combine like terms: -9x + 3x = -6x
-21 + -6x = -7 + -3x + 3x

Combine like terms: -3x + 3x = 0
-21 + -6x = -7 + 0
-21 + -6x = -7

Add '21' to each side of the equation.
-21 + 21 + -6x = -7 + 21

Combine like terms: -21 + 21 = 0
0 + -6x = -7 + 21
-6x = -7 + 21

Combine like terms: -7 + 21 = 14
-6x = 14

Divide each side by '-6'.
x = -2.333333333

Simplifying
x = -2.333333333

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