15=-7u+5(u+7)

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Solution for 15=-7u+5(u+7) equation:


Simplifying
15 = -7u + 5(u + 7)

Reorder the terms:
15 = -7u + 5(7 + u)
15 = -7u + (7 * 5 + u * 5)
15 = -7u + (35 + 5u)

Reorder the terms:
15 = 35 + -7u + 5u

Combine like terms: -7u + 5u = -2u
15 = 35 + -2u

Solving
15 = 35 + -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.
15 + 2u = 35 + -2u + 2u

Combine like terms: -2u + 2u = 0
15 + 2u = 35 + 0
15 + 2u = 35

Add '-15' to each side of the equation.
15 + -15 + 2u = 35 + -15

Combine like terms: 15 + -15 = 0
0 + 2u = 35 + -15
2u = 35 + -15

Combine like terms: 35 + -15 = 20
2u = 20

Divide each side by '2'.
u = 10

Simplifying
u = 10

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