5x-7x=12+30

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Solution for 5x-7x=12+30 equation: 


Simplifying
5x + -7x = 12 + 30

Combine like terms: 5x + -7x = -2x
-2x = 12 + 30

Combine like terms: 12 + 30 = 42
-2x = 42

Solving
-2x = 42

Solving for variable 'x'.

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

Divide each side by '-2'.
x = -21

Simplifying
x = -21

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