7x-12=2x+9

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Solution for 7x-12=2x+9 equation:


Simplifying
7x + -12 = 2x + 9

Reorder the terms:
-12 + 7x = 2x + 9

Reorder the terms:
-12 + 7x = 9 + 2x

Solving
-12 + 7x = 9 + 2x

Solving for variable 'x'.

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

Add '-2x' to each side of the equation.
-12 + 7x + -2x = 9 + 2x + -2x

Combine like terms: 7x + -2x = 5x
-12 + 5x = 9 + 2x + -2x

Combine like terms: 2x + -2x = 0
-12 + 5x = 9 + 0
-12 + 5x = 9

Add '12' to each side of the equation.
-12 + 12 + 5x = 9 + 12

Combine like terms: -12 + 12 = 0
0 + 5x = 9 + 12
5x = 9 + 12

Combine like terms: 9 + 12 = 21
5x = 21

Divide each side by '5'.
x = 4.2

Simplifying
x = 4.2

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