7u+12=3u+9

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Solution for 7u+12=3u+9 equation:


Simplifying
7u + 12 = 3u + 9

Reorder the terms:
12 + 7u = 3u + 9

Reorder the terms:
12 + 7u = 9 + 3u

Solving
12 + 7u = 9 + 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.
12 + 7u + -3u = 9 + 3u + -3u

Combine like terms: 7u + -3u = 4u
12 + 4u = 9 + 3u + -3u

Combine like terms: 3u + -3u = 0
12 + 4u = 9 + 0
12 + 4u = 9

Add '-12' to each side of the equation.
12 + -12 + 4u = 9 + -12

Combine like terms: 12 + -12 = 0
0 + 4u = 9 + -12
4u = 9 + -12

Combine like terms: 9 + -12 = -3
4u = -3

Divide each side by '4'.
u = -0.75

Simplifying
u = -0.75

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