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

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


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

Reorder the terms:
2x + -3(-3 + 2x) = 21
2x + (-3 * -3 + 2x * -3) = 21
2x + (9 + -6x) = 21

Reorder the terms:
9 + 2x + -6x = 21

Combine like terms: 2x + -6x = -4x
9 + -4x = 21

Solving
9 + -4x = 21

Solving for variable 'x'.

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

Add '-9' to each side of the equation.
9 + -9 + -4x = 21 + -9

Combine like terms: 9 + -9 = 0
0 + -4x = 21 + -9
-4x = 21 + -9

Combine like terms: 21 + -9 = 12
-4x = 12

Divide each side by '-4'.
x = -3

Simplifying
x = -3

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