15=4(x-2)-21

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Solution for 15=4(x-2)-21 equation: 


Simplifying
15 = 4(x + -2) + -21

Reorder the terms:
15 = 4(-2 + x) + -21
15 = (-2 * 4 + x * 4) + -21
15 = (-8 + 4x) + -21

Reorder the terms:
15 = -8 + -21 + 4x

Combine like terms: -8 + -21 = -29
15 = -29 + 4x

Solving
15 = -29 + 4x

Solving for variable 'x'.

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

Add '-4x' to each side of the equation.
15 + -4x = -29 + 4x + -4x

Combine like terms: 4x + -4x = 0
15 + -4x = -29 + 0
15 + -4x = -29

Add '-15' to each side of the equation.
15 + -15 + -4x = -29 + -15

Combine like terms: 15 + -15 = 0
0 + -4x = -29 + -15
-4x = -29 + -15

Combine like terms: -29 + -15 = -44
-4x = -44

Divide each side by '-4'.
x = 11

Simplifying
x = 11

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