-12+7x=4x+21

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Solution for -12+7x=4x+21 equation:


Simplifying
-12 + 7x = 4x + 21

Reorder the terms:
-12 + 7x = 21 + 4x

Solving
-12 + 7x = 21 + 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.
-12 + 7x + -4x = 21 + 4x + -4x

Combine like terms: 7x + -4x = 3x
-12 + 3x = 21 + 4x + -4x

Combine like terms: 4x + -4x = 0
-12 + 3x = 21 + 0
-12 + 3x = 21

Add '12' to each side of the equation.
-12 + 12 + 3x = 21 + 12

Combine like terms: -12 + 12 = 0
0 + 3x = 21 + 12
3x = 21 + 12

Combine like terms: 21 + 12 = 33
3x = 33

Divide each side by '3'.
x = 11

Simplifying
x = 11

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