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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