-x-45=90+8x

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


Simplifying
-1x + -45 = 90 + 8x

Reorder the terms:
-45 + -1x = 90 + 8x

Solving
-45 + -1x = 90 + 8x

Solving for variable 'x'.

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

Add '-8x' to each side of the equation.
-45 + -1x + -8x = 90 + 8x + -8x

Combine like terms: -1x + -8x = -9x
-45 + -9x = 90 + 8x + -8x

Combine like terms: 8x + -8x = 0
-45 + -9x = 90 + 0
-45 + -9x = 90

Add '45' to each side of the equation.
-45 + 45 + -9x = 90 + 45

Combine like terms: -45 + 45 = 0
0 + -9x = 90 + 45
-9x = 90 + 45

Combine like terms: 90 + 45 = 135
-9x = 135

Divide each side by '-9'.
x = -15

Simplifying
x = -15

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