3u-15=5(u-7)

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Solution for 3u-15=5(u-7) equation:


Simplifying
3u + -15 = 5(u + -7)

Reorder the terms:
-15 + 3u = 5(u + -7)

Reorder the terms:
-15 + 3u = 5(-7 + u)
-15 + 3u = (-7 * 5 + u * 5)
-15 + 3u = (-35 + 5u)

Solving
-15 + 3u = -35 + 5u

Solving for variable 'u'.

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

Add '-5u' to each side of the equation.
-15 + 3u + -5u = -35 + 5u + -5u

Combine like terms: 3u + -5u = -2u
-15 + -2u = -35 + 5u + -5u

Combine like terms: 5u + -5u = 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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