7x+8x=45-90

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Solution for 7x+8x=45-90 equation: 


Simplifying
7x + 8x = 45 + -90

Combine like terms: 7x + 8x = 15x
15x = 45 + -90

Combine like terms: 45 + -90 = -45
15x = -45

Solving
15x = -45

Solving for variable 'x'.

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

Divide each side by '15'.
x = -3

Simplifying
x = -3

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