3+5x+7x=87

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Solution for 3+5x+7x=87 equation: 


Simplifying
3 + 5x + 7x = 87

Combine like terms: 5x + 7x = 12x
3 + 12x = 87

Solving
3 + 12x = 87

Solving for variable 'x'.

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

Add '-3' to each side of the equation.
3 + -3 + 12x = 87 + -3

Combine like terms: 3 + -3 = 0
0 + 12x = 87 + -3
12x = 87 + -3

Combine like terms: 87 + -3 = 84
12x = 84

Divide each side by '12'.
x = 7

Simplifying
x = 7

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