4(3-u)+u=18

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Solution for 4(3-u)+u=18 equation:


Simplifying
4(3 + -1u) + u = 18
(3 * 4 + -1u * 4) + u = 18
(12 + -4u) + u = 18

Combine like terms: -4u + u = -3u
12 + -3u = 18

Solving
12 + -3u = 18

Solving for variable 'u'.

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

Add '-12' to each side of the equation.
12 + -12 + -3u = 18 + -12

Combine like terms: 12 + -12 = 0
0 + -3u = 18 + -12
-3u = 18 + -12

Combine like terms: 18 + -12 = 6
-3u = 6

Divide each side by '-3'.
u = -2

Simplifying
u = -2

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