28=2u+5(u-7)

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Solution for 28=2u+5(u-7) equation:


Simplifying
28 = 2u + 5(u + -7)

Reorder the terms:
28 = 2u + 5(-7 + u)
28 = 2u + (-7 * 5 + u * 5)
28 = 2u + (-35 + 5u)

Reorder the terms:
28 = -35 + 2u + 5u

Combine like terms: 2u + 5u = 7u
28 = -35 + 7u

Solving
28 = -35 + 7u

Solving for variable 'u'.

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

Add '-7u' to each side of the equation.
28 + -7u = -35 + 7u + -7u

Combine like terms: 7u + -7u = 0
28 + -7u = -35 + 0
28 + -7u = -35

Add '-28' to each side of the equation.
28 + -28 + -7u = -35 + -28

Combine like terms: 28 + -28 = 0
0 + -7u = -35 + -28
-7u = -35 + -28

Combine like terms: -35 + -28 = -63
-7u = -63

Divide each side by '-7'.
u = 9

Simplifying
u = 9

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