15+21=-4(3x-9)

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Solution for 15+21=-4(3x-9) equation:


Simplifying
15 + 21 = -4(3x + -9)

Combine like terms: 15 + 21 = 36
36 = -4(3x + -9)

Reorder the terms:
36 = -4(-9 + 3x)
36 = (-9 * -4 + 3x * -4)
36 = (36 + -12x)

Add '-36' to each side of the equation.
36 + -36 = 36 + -36 + -12x

Combine like terms: 36 + -36 = 0
0 = 36 + -36 + -12x

Combine like terms: 36 + -36 = 0
0 = 0 + -12x
0 = -12x

Solving
0 = -12x

Solving for variable 'x'.

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

Add '12x' to each side of the equation.
0 + 12x = -12x + 12x
Remove the zero:
12x = -12x + 12x

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

Divide each side by '12'.
x = 0

Simplifying
x = 0

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