-21=3(4x-3)

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


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

Reorder the terms:
-21 = 3(-3 + 4x)
-21 = (-3 * 3 + 4x * 3)
-21 = (-9 + 12x)

Solving
-21 = -9 + 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.
-21 + -12x = -9 + 12x + -12x

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

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

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

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

Divide each side by '-12'.
x = -1

Simplifying
x = -1

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