21x-9-15x+2=18x-7-12x+12

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Solution for 21x-9-15x+2=18x-7-12x+12 equation:


Simplifying
21x + -9 + -15x + 2 = 18x + -7 + -12x + 12

Reorder the terms:
-9 + 2 + 21x + -15x = 18x + -7 + -12x + 12

Combine like terms: -9 + 2 = -7
-7 + 21x + -15x = 18x + -7 + -12x + 12

Combine like terms: 21x + -15x = 6x
-7 + 6x = 18x + -7 + -12x + 12

Reorder the terms:
-7 + 6x = -7 + 12 + 18x + -12x

Combine like terms: -7 + 12 = 5
-7 + 6x = 5 + 18x + -12x

Combine like terms: 18x + -12x = 6x
-7 + 6x = 5 + 6x

Add '-6x' to each side of the equation.
-7 + 6x + -6x = 5 + 6x + -6x

Combine like terms: 6x + -6x = 0
-7 + 0 = 5 + 6x + -6x
-7 = 5 + 6x + -6x

Combine like terms: 6x + -6x = 0
-7 = 5 + 0
-7 = 5

Solving
-7 = 5

Couldn't find a variable to solve for.

This equation is invalid, the left and right sides are not equal, therefore there is no solution.

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