12+5u=2u-9

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Solution for 12+5u=2u-9 equation:


Simplifying
12 + 5u = 2u + -9

Reorder the terms:
12 + 5u = -9 + 2u

Solving
12 + 5u = -9 + 2u

Solving for variable 'u'.

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

Add '-2u' to each side of the equation.
12 + 5u + -2u = -9 + 2u + -2u

Combine like terms: 5u + -2u = 3u
12 + 3u = -9 + 2u + -2u

Combine like terms: 2u + -2u = 0
12 + 3u = -9 + 0
12 + 3u = -9

Add '-12' to each side of the equation.
12 + -12 + 3u = -9 + -12

Combine like terms: 12 + -12 = 0
0 + 3u = -9 + -12
3u = -9 + -12

Combine like terms: -9 + -12 = -21
3u = -21

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

Simplifying
u = -7

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