-72=6x-3(-7x-21)

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Solution for -72=6x-3(-7x-21) equation:


Simplifying
-72 = 6x + -3(-7x + -21)

Reorder the terms:
-72 = 6x + -3(-21 + -7x)
-72 = 6x + (-21 * -3 + -7x * -3)
-72 = 6x + (63 + 21x)

Reorder the terms:
-72 = 63 + 6x + 21x

Combine like terms: 6x + 21x = 27x
-72 = 63 + 27x

Solving
-72 = 63 + 27x

Solving for variable 'x'.

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

Add '-27x' to each side of the equation.
-72 + -27x = 63 + 27x + -27x

Combine like terms: 27x + -27x = 0
-72 + -27x = 63 + 0
-72 + -27x = 63

Add '72' to each side of the equation.
-72 + 72 + -27x = 63 + 72

Combine like terms: -72 + 72 = 0
0 + -27x = 63 + 72
-27x = 63 + 72

Combine like terms: 63 + 72 = 135
-27x = 135

Divide each side by '-27'.
x = -5

Simplifying
x = -5

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