9=7u-4u

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Solution for 9=7u-4u equation:


Simplifying
9 = 7u + -4u

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

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

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

Add '-9' to each side of the equation.
9 + -9 + -3u = 0 + -9

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

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

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

Simplifying
u = 3

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