-7+4u+u=1

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Solution for -7+4u+u=1 equation: 


Simplifying
-7 + 4u + u = 1

Combine like terms: 4u + u = 5u
-7 + 5u = 1

Solving
-7 + 5u = 1

Solving for variable 'u'.

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

Add '7' to each side of the equation.
-7 + 7 + 5u = 1 + 7

Combine like terms: -7 + 7 = 0
0 + 5u = 1 + 7
5u = 1 + 7

Combine like terms: 1 + 7 = 8
5u = 8

Divide each side by '5'.
u = 1.6

Simplifying
u = 1.6

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