(3x-9)+(x+7)=180

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Solution for (3x-9)+(x+7)=180 equation:


Simplifying
(3x + -9) + (x + 7) = 180

Reorder the terms:
(-9 + 3x) + (x + 7) = 180

Remove parenthesis around (-9 + 3x)
-9 + 3x + (x + 7) = 180

Reorder the terms:
-9 + 3x + (7 + x) = 180

Remove parenthesis around (7 + x)
-9 + 3x + 7 + x = 180

Reorder the terms:
-9 + 7 + 3x + x = 180

Combine like terms: -9 + 7 = -2
-2 + 3x + x = 180

Combine like terms: 3x + x = 4x
-2 + 4x = 180

Solving
-2 + 4x = 180

Solving for variable 'x'.

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

Add '2' to each side of the equation.
-2 + 2 + 4x = 180 + 2

Combine like terms: -2 + 2 = 0
0 + 4x = 180 + 2
4x = 180 + 2

Combine like terms: 180 + 2 = 182
4x = 182

Divide each side by '4'.
x = 45.5

Simplifying
x = 45.5

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