90=7x-15

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Solution for 90=7x-15 equation:


Simplifying
90 = 7x + -15

Reorder the terms:
90 = -15 + 7x

Solving
90 = -15 + 7x

Solving for variable 'x'.

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

Add '-7x' to each side of the equation.
90 + -7x = -15 + 7x + -7x

Combine like terms: 7x + -7x = 0
90 + -7x = -15 + 0
90 + -7x = -15

Add '-90' to each side of the equation.
90 + -90 + -7x = -15 + -90

Combine like terms: 90 + -90 = 0
0 + -7x = -15 + -90
-7x = -15 + -90

Combine like terms: -15 + -90 = -105
-7x = -105

Divide each side by '-7'.
x = 15

Simplifying
x = 15

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