3u-12=-7+28

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Solution for 3u-12=-7+28 equation: 


Simplifying
3u + -12 = -7 + 28

Reorder the terms:
-12 + 3u = -7 + 28

Combine like terms: -7 + 28 = 21
-12 + 3u = 21

Solving
-12 + 3u = 21

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 = 21 + 12

Combine like terms: -12 + 12 = 0
0 + 3u = 21 + 12
3u = 21 + 12

Combine like terms: 21 + 12 = 33
3u = 33

Divide each side by '3'.
u = 11

Simplifying
u = 11

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