7x-9x=-13

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Solution for 7x-9x=-13 equation: 


Simplifying
7x + -9x = -13

Combine like terms: 7x + -9x = -2x
-2x = -13

Solving
-2x = -13

Solving for variable 'x'.

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

Divide each side by '-2'.
x = 6.5

Simplifying
x = 6.5

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