9=-3+4u

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Solution for 9=-3+4u equation:


Simplifying
9 = -3 + 4u

Solving
9 = -3 + 4u

Solving for variable 'u'.

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

Add '-4u' to each side of the equation.
9 + -4u = -3 + 4u + -4u

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

Add '-9' to each side of the equation.
9 + -9 + -4u = -3 + -9

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

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

Divide each side by '-4'.
u = 3

Simplifying
u = 3

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