-28=3u-7

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Solution for -28=3u-7 equation:


Simplifying
-28 = 3u + -7

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

Solving
-28 = -7 + 3u

Solving for variable 'u'.

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

Add '-3u' to each side of the equation.
-28 + -3u = -7 + 3u + -3u

Combine like terms: 3u + -3u = 0
-28 + -3u = -7 + 0
-28 + -3u = -7

Add '28' to each side of the equation.
-28 + 28 + -3u = -7 + 28

Combine like terms: -28 + 28 = 0
0 + -3u = -7 + 28
-3u = -7 + 28

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

Divide each side by '-3'.
u = -7

Simplifying
u = -7

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