3x-4x-8=-15

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Solution for 3x-4x-8=-15 equation:


Simplifying
3x + -4x + -8 = -15

Reorder the terms:
-8 + 3x + -4x = -15

Combine like terms: 3x + -4x = -1x
-8 + -1x = -15

Solving
-8 + -1x = -15

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 + -1x = -15 + 8

Combine like terms: -8 + 8 = 0
0 + -1x = -15 + 8
-1x = -15 + 8

Combine like terms: -15 + 8 = -7
-1x = -7

Divide each side by '-1'.
x = 7

Simplifying
x = 7

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