7x-12=21-5x

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Solution for 7x-12=21-5x equation:


Simplifying
7x + -12 = 21 + -5x

Reorder the terms:
-12 + 7x = 21 + -5x

Solving
-12 + 7x = 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 + 7x + 5x = 21 + -5x + 5x

Combine like terms: 7x + 5x = 12x
-12 + 12x = 21 + -5x + 5x

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

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

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

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

Divide each side by '12'.
x = 2.75

Simplifying
x = 2.75

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