4+5-5u+7u=

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Solution for 4+5-5u+7u= equation:


Simplifying
4 + 5 + -5u + 7u = 0

Combine like terms: 4 + 5 = 9
9 + -5u + 7u = 0

Combine like terms: -5u + 7u = 2u
9 + 2u = 0

Solving
9 + 2u = 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 + 2u = 0 + -9

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

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

Divide each side by '2'.
u = -4.5

Simplifying
u = -4.5

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