4(x-7)-12=4x-21

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Solution for 4(x-7)-12=4x-21 equation: 


Simplifying
4(x + -7) + -12 = 4x + -21

Reorder the terms:
4(-7 + x) + -12 = 4x + -21
(-7 * 4 + x * 4) + -12 = 4x + -21
(-28 + 4x) + -12 = 4x + -21

Reorder the terms:
-28 + -12 + 4x = 4x + -21

Combine like terms: -28 + -12 = -40
-40 + 4x = 4x + -21

Reorder the terms:
-40 + 4x = -21 + 4x

Add '-4x' to each side of the equation.
-40 + 4x + -4x = -21 + 4x + -4x

Combine like terms: 4x + -4x = 0
-40 + 0 = -21 + 4x + -4x
-40 = -21 + 4x + -4x

Combine like terms: 4x + -4x = 0
-40 = -21 + 0
-40 = -21

Solving
-40 = -21

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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