2x+9+2x+9=7x-12

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


Simplifying
2x + 9 + 2x + 9 = 7x + -12

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

Combine like terms: 9 + 9 = 18
18 + 2x + 2x = 7x + -12

Combine like terms: 2x + 2x = 4x
18 + 4x = 7x + -12

Reorder the terms:
18 + 4x = -12 + 7x

Solving
18 + 4x = -12 + 7x

Solving for variable 'x'.

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

Add '-7x' to each side of the equation.
18 + 4x + -7x = -12 + 7x + -7x

Combine like terms: 4x + -7x = -3x
18 + -3x = -12 + 7x + -7x

Combine like terms: 7x + -7x = 0
18 + -3x = -12 + 0
18 + -3x = -12

Add '-18' to each side of the equation.
18 + -18 + -3x = -12 + -18

Combine like terms: 18 + -18 = 0
0 + -3x = -12 + -18
-3x = -12 + -18

Combine like terms: -12 + -18 = -30
-3x = -30

Divide each side by '-3'.
x = 10

Simplifying
x = 10

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