-8=-u-3u

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


Simplifying
-8 = -1u + -3u

Combine like terms: -1u + -3u = -4u
-8 = -4u

Solving
-8 = -4u

Solving for variable 'u'.

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

Add '4u' to each side of the equation.
-8 + 4u = -4u + 4u

Combine like terms: -4u + 4u = 0
-8 + 4u = 0

Add '8' to each side of the equation.
-8 + 8 + 4u = 0 + 8

Combine like terms: -8 + 8 = 0
0 + 4u = 0 + 8
4u = 0 + 8

Combine like terms: 0 + 8 = 8
4u = 8

Divide each side by '4'.
u = 2

Simplifying
u = 2

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