-20=5(u-7)-8u

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Solution for -20=5(u-7)-8u equation:


Simplifying
-20 = 5(u + -7) + -8u

Reorder the terms:
-20 = 5(-7 + u) + -8u
-20 = (-7 * 5 + u * 5) + -8u
-20 = (-35 + 5u) + -8u

Combine like terms: 5u + -8u = -3u
-20 = -35 + -3u

Solving
-20 = -35 + -3u

Solving for variable 'u'.

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

Add '3u' to each side of the equation.
-20 + 3u = -35 + -3u + 3u

Combine like terms: -3u + 3u = 0
-20 + 3u = -35 + 0
-20 + 3u = -35

Add '20' to each side of the equation.
-20 + 20 + 3u = -35 + 20

Combine like terms: -20 + 20 = 0
0 + 3u = -35 + 20
3u = -35 + 20

Combine like terms: -35 + 20 = -15
3u = -15

Divide each side by '3'.
u = -5

Simplifying
u = -5

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