3u+(u-15)=10

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Solution for 3u+(u-15)=10 equation: 


Simplifying
3u + (u + -15) = 10

Reorder the terms:
3u + (-15 + u) = 10

Remove parenthesis around (-15 + u)
3u + -15 + u = 10

Reorder the terms:
-15 + 3u + u = 10

Combine like terms: 3u + u = 4u
-15 + 4u = 10

Solving
-15 + 4u = 10

Solving for variable 'u'.

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

Add '15' to each side of the equation.
-15 + 15 + 4u = 10 + 15

Combine like terms: -15 + 15 = 0
0 + 4u = 10 + 15
4u = 10 + 15

Combine like terms: 10 + 15 = 25
4u = 25

Divide each side by '4'.
u = 6.25

Simplifying
u = 6.25

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