3(x-21)=12x

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Solution for 3(x-21)=12x equation:


Simplifying
3(x + -21) = 12x

Reorder the terms:
3(-21 + x) = 12x
(-21 * 3 + x * 3) = 12x
(-63 + 3x) = 12x

Solving
-63 + 3x = 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.
-63 + 3x + -12x = 12x + -12x

Combine like terms: 3x + -12x = -9x
-63 + -9x = 12x + -12x

Combine like terms: 12x + -12x = 0
-63 + -9x = 0

Add '63' to each side of the equation.
-63 + 63 + -9x = 0 + 63

Combine like terms: -63 + 63 = 0
0 + -9x = 0 + 63
-9x = 0 + 63

Combine like terms: 0 + 63 = 63
-9x = 63

Divide each side by '-9'.
x = -7

Simplifying
x = -7

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