-7u-12=20-9u

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Solution for -7u-12=20-9u equation:


Simplifying
-7u + -12 = 20 + -9u

Reorder the terms:
-12 + -7u = 20 + -9u

Solving
-12 + -7u = 20 + -9u

Solving for variable 'u'.

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

Add '9u' to each side of the equation.
-12 + -7u + 9u = 20 + -9u + 9u

Combine like terms: -7u + 9u = 2u
-12 + 2u = 20 + -9u + 9u

Combine like terms: -9u + 9u = 0
-12 + 2u = 20 + 0
-12 + 2u = 20

Add '12' to each side of the equation.
-12 + 12 + 2u = 20 + 12

Combine like terms: -12 + 12 = 0
0 + 2u = 20 + 12
2u = 20 + 12

Combine like terms: 20 + 12 = 32
2u = 32

Divide each side by '2'.
u = 16

Simplifying
u = 16

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