12-4u=-3-u

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Solution for 12-4u=-3-u equation:


Simplifying
12 + -4u = -3 + -1u

Solving
12 + -4u = -3 + -1u

Solving for variable 'u'.

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

Add 'u' to each side of the equation.
12 + -4u + u = -3 + -1u + u

Combine like terms: -4u + u = -3u
12 + -3u = -3 + -1u + u

Combine like terms: -1u + u = 0
12 + -3u = -3 + 0
12 + -3u = -3

Add '-12' to each side of the equation.
12 + -12 + -3u = -3 + -12

Combine like terms: 12 + -12 = 0
0 + -3u = -3 + -12
-3u = -3 + -12

Combine like terms: -3 + -12 = -15
-3u = -15

Divide each side by '-3'.
u = 5

Simplifying
u = 5

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