15+9x=90

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Solution for 15+9x=90 equation: 


Simplifying
15 + 9x = 90

Solving
15 + 9x = 90

Solving for variable 'x'.

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

Add '-15' to each side of the equation.
15 + -15 + 9x = 90 + -15

Combine like terms: 15 + -15 = 0
0 + 9x = 90 + -15
9x = 90 + -15

Combine like terms: 90 + -15 = 75
9x = 75

Divide each side by '9'.
x = 8.333333333

Simplifying
x = 8.333333333

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