3x-8+x=40

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Solution for 3x-8+x=40 equation: 


Simplifying
3x + -8 + x = 40

Reorder the terms:
-8 + 3x + x = 40

Combine like terms: 3x + x = 4x
-8 + 4x = 40

Solving
-8 + 4x = 40

Solving for variable 'x'.

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

Add '8' to each side of the equation.
-8 + 8 + 4x = 40 + 8

Combine like terms: -8 + 8 = 0
0 + 4x = 40 + 8
4x = 40 + 8

Combine like terms: 40 + 8 = 48
4x = 48

Divide each side by '4'.
x = 12

Simplifying
x = 12

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