-3x+2(-3x-7)=21-2x

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Solution for -3x+2(-3x-7)=21-2x equation:


Simplifying
-3x + 2(-3x + -7) = 21 + -2x

Reorder the terms:
-3x + 2(-7 + -3x) = 21 + -2x
-3x + (-7 * 2 + -3x * 2) = 21 + -2x
-3x + (-14 + -6x) = 21 + -2x

Reorder the terms:
-14 + -3x + -6x = 21 + -2x

Combine like terms: -3x + -6x = -9x
-14 + -9x = 21 + -2x

Solving
-14 + -9x = 21 + -2x

Solving for variable 'x'.

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

Add '2x' to each side of the equation.
-14 + -9x + 2x = 21 + -2x + 2x

Combine like terms: -9x + 2x = -7x
-14 + -7x = 21 + -2x + 2x

Combine like terms: -2x + 2x = 0
-14 + -7x = 21 + 0
-14 + -7x = 21

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

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

Combine like terms: 21 + 14 = 35
-7x = 35

Divide each side by '-7'.
x = -5

Simplifying
x = -5

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