-3u-8=-21u-8

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Solution for -3u-8=-21u-8 equation:


Simplifying
-3u + -8 = -21u + -8

Reorder the terms:
-8 + -3u = -21u + -8

Reorder the terms:
-8 + -3u = -8 + -21u

Add '8' to each side of the equation.
-8 + 8 + -3u = -8 + 8 + -21u

Combine like terms: -8 + 8 = 0
0 + -3u = -8 + 8 + -21u
-3u = -8 + 8 + -21u

Combine like terms: -8 + 8 = 0
-3u = 0 + -21u
-3u = -21u

Solving
-3u = -21u

Solving for variable 'u'.

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

Add '21u' to each side of the equation.
-3u + 21u = -21u + 21u

Combine like terms: -3u + 21u = 18u
18u = -21u + 21u

Combine like terms: -21u + 21u = 0
18u = 0

Divide each side by '18'.
u = 0

Simplifying
u = 0

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