7(x-3)-7x-21=0

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Solution for 7(x-3)-7x-21=0 equation: 


Simplifying
7(x + -3) + -7x + -21 = 0

Reorder the terms:
7(-3 + x) + -7x + -21 = 0
(-3 * 7 + x * 7) + -7x + -21 = 0
(-21 + 7x) + -7x + -21 = 0

Reorder the terms:
-21 + -21 + 7x + -7x = 0

Combine like terms: -21 + -21 = -42
-42 + 7x + -7x = 0

Combine like terms: 7x + -7x = 0
-42 + 0 = 0
-42 = 0

Solving
-42 = 0

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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