3x-40+7x+15=180

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Solution for 3x-40+7x+15=180 equation:


Simplifying
3x + -40 + 7x + 15 = 180

Reorder the terms:
-40 + 15 + 3x + 7x = 180

Combine like terms: -40 + 15 = -25
-25 + 3x + 7x = 180

Combine like terms: 3x + 7x = 10x
-25 + 10x = 180

Solving
-25 + 10x = 180

Solving for variable 'x'.

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

Add '25' to each side of the equation.
-25 + 25 + 10x = 180 + 25

Combine like terms: -25 + 25 = 0
0 + 10x = 180 + 25
10x = 180 + 25

Combine like terms: 180 + 25 = 205
10x = 205

Divide each side by '10'.
x = 20.5

Simplifying
x = 20.5

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