8x-5x=15+12

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Solution for 8x-5x=15+12 equation: 


Simplifying
8x + -5x = 15 + 12

Combine like terms: 8x + -5x = 3x
3x = 15 + 12

Combine like terms: 15 + 12 = 27
3x = 27

Solving
3x = 27

Solving for variable 'x'.

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

Divide each side by '3'.
x = 9

Simplifying
x = 9

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