9+4u=90-2u

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Solution for 9+4u=90-2u equation:


Simplifying
9 + 4u = 90 + -2u

Solving
9 + 4u = 90 + -2u

Solving for variable 'u'.

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

Add '2u' to each side of the equation.
9 + 4u + 2u = 90 + -2u + 2u

Combine like terms: 4u + 2u = 6u
9 + 6u = 90 + -2u + 2u

Combine like terms: -2u + 2u = 0
9 + 6u = 90 + 0
9 + 6u = 90

Add '-9' to each side of the equation.
9 + -9 + 6u = 90 + -9

Combine like terms: 9 + -9 = 0
0 + 6u = 90 + -9
6u = 90 + -9

Combine like terms: 90 + -9 = 81
6u = 81

Divide each side by '6'.
u = 13.5

Simplifying
u = 13.5

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