21x+4=15x+-80

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Solution for 21x+4=15x+-80 equation:


Simplifying
21x + 4 = 15x + -80

Reorder the terms:
4 + 21x = 15x + -80

Reorder the terms:
4 + 21x = -80 + 15x

Solving
4 + 21x = -80 + 15x

Solving for variable 'x'.

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

Add '-15x' to each side of the equation.
4 + 21x + -15x = -80 + 15x + -15x

Combine like terms: 21x + -15x = 6x
4 + 6x = -80 + 15x + -15x

Combine like terms: 15x + -15x = 0
4 + 6x = -80 + 0
4 + 6x = -80

Add '-4' to each side of the equation.
4 + -4 + 6x = -80 + -4

Combine like terms: 4 + -4 = 0
0 + 6x = -80 + -4
6x = -80 + -4

Combine like terms: -80 + -4 = -84
6x = -84

Divide each side by '6'.
x = -14

Simplifying
x = -14

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