3x+87=123

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Solution for 3x+87=123 equation: 


Simplifying
3x + 87 = 123

Reorder the terms:
87 + 3x = 123

Solving
87 + 3x = 123

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 = 123 + -87

Combine like terms: 87 + -87 = 0
0 + 3x = 123 + -87
3x = 123 + -87

Combine like terms: 123 + -87 = 36
3x = 36

Divide each side by '3'.
x = 12

Simplifying
x = 12

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