-12u-21=4(-3u-7)

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Solution for -12u-21=4(-3u-7) equation:


Simplifying
-12u + -21 = 4(-3u + -7)

Reorder the terms:
-21 + -12u = 4(-3u + -7)

Reorder the terms:
-21 + -12u = 4(-7 + -3u)
-21 + -12u = (-7 * 4 + -3u * 4)
-21 + -12u = (-28 + -12u)

Add '12u' to each side of the equation.
-21 + -12u + 12u = -28 + -12u + 12u

Combine like terms: -12u + 12u = 0
-21 + 0 = -28 + -12u + 12u
-21 = -28 + -12u + 12u

Combine like terms: -12u + 12u = 0
-21 = -28 + 0
-21 = -28

Solving
-21 = -28

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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