-4(x-3)=5x+21

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Solution for -4(x-3)=5x+21 equation:


Simplifying
-4(x + -3) = 5x + 21

Reorder the terms:
-4(-3 + x) = 5x + 21
(-3 * -4 + x * -4) = 5x + 21
(12 + -4x) = 5x + 21

Reorder the terms:
12 + -4x = 21 + 5x

Solving
12 + -4x = 21 + 5x

Solving for variable 'x'.

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

Add '-5x' to each side of the equation.
12 + -4x + -5x = 21 + 5x + -5x

Combine like terms: -4x + -5x = -9x
12 + -9x = 21 + 5x + -5x

Combine like terms: 5x + -5x = 0
12 + -9x = 21 + 0
12 + -9x = 21

Add '-12' to each side of the equation.
12 + -12 + -9x = 21 + -12

Combine like terms: 12 + -12 = 0
0 + -9x = 21 + -12
-9x = 21 + -12

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

Divide each side by '-9'.
x = -1

Simplifying
x = -1

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