7=-5u+3(3+u)

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Solution for 7=-5u+3(3+u) equation:


Simplifying
7 = -5u + 3(3 + u)
7 = -5u + (3 * 3 + u * 3)
7 = -5u + (9 + 3u)

Reorder the terms:
7 = 9 + -5u + 3u

Combine like terms: -5u + 3u = -2u
7 = 9 + -2u

Solving
7 = 9 + -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.
7 + 2u = 9 + -2u + 2u

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

Add '-7' to each side of the equation.
7 + -7 + 2u = 9 + -7

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

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

Divide each side by '2'.
u = 1

Simplifying
u = 1

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