3u+9-7u=

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


Simplifying
3u + 9 + -7u = 0

Reorder the terms:
9 + 3u + -7u = 0

Combine like terms: 3u + -7u = -4u
9 + -4u = 0

Solving
9 + -4u = 0

Solving for variable 'u'.

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

Add '-9' to each side of the equation.
9 + -9 + -4u = 0 + -9

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

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

Divide each side by '-4'.
u = 2.25

Simplifying
u = 2.25

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