X+3(87)=90

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Solution for X+3(87)=90 equation: 


Simplifying
X + 3(87) = 90

Multiply 3 * 87
X + 261 = 90

Reorder the terms:
261 + X = 90

Solving
261 + X = 90

Solving for variable 'X'.

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

Add '-261' to each side of the equation.
261 + -261 + X = 90 + -261

Combine like terms: 261 + -261 = 0
0 + X = 90 + -261
X = 90 + -261

Combine like terms: 90 + -261 = -171
X = -171

Simplifying
X = -171

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