105-3x-18=90

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Solution for 105-3x-18=90 equation:


Simplifying
105 + -3x + -18 = 90

Reorder the terms:
105 + -18 + -3x = 90

Combine like terms: 105 + -18 = 87
87 + -3x = 90

Solving
87 + -3x = 90

Solving for variable 'x'.

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

Add '-87' to each side of the equation.
87 + -87 + -3x = 90 + -87

Combine like terms: 87 + -87 = 0
0 + -3x = 90 + -87
-3x = 90 + -87

Combine like terms: 90 + -87 = 3
-3x = 3

Divide each side by '-3'.
x = -1

Simplifying
x = -1

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