-3x+21-12x-5=-59

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Solution for -3x+21-12x-5=-59 equation: 


Simplifying
-3x + 21 + -12x + -5 = -59

Reorder the terms:
21 + -5 + -3x + -12x = -59

Combine like terms: 21 + -5 = 16
16 + -3x + -12x = -59

Combine like terms: -3x + -12x = -15x
16 + -15x = -59

Solving
16 + -15x = -59

Solving for variable 'x'.

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

Add '-16' to each side of the equation.
16 + -16 + -15x = -59 + -16

Combine like terms: 16 + -16 = 0
0 + -15x = -59 + -16
-15x = -59 + -16

Combine like terms: -59 + -16 = -75
-15x = -75

Divide each side by '-15'.
x = 5

Simplifying
x = 5

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