9x-7x=30

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Solution for 9x-7x=30 equation: 


Simplifying
9x + -7x = 30

Combine like terms: 9x + -7x = 2x
2x = 30

Solving
2x = 30

Solving for variable 'x'.

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

Divide each side by '2'.
x = 15

Simplifying
x = 15

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