-20=4(u-8)-7u

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Solution for -20=4(u-8)-7u equation:


Simplifying
-20 = 4(u + -8) + -7u

Reorder the terms:
-20 = 4(-8 + u) + -7u
-20 = (-8 * 4 + u * 4) + -7u
-20 = (-32 + 4u) + -7u

Combine like terms: 4u + -7u = -3u
-20 = -32 + -3u

Solving
-20 = -32 + -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 = -32 + -3u + 3u

Combine like terms: -3u + 3u = 0
-20 + 3u = -32 + 0
-20 + 3u = -32

Add '20' to each side of the equation.
-20 + 20 + 3u = -32 + 20

Combine like terms: -20 + 20 = 0
0 + 3u = -32 + 20
3u = -32 + 20

Combine like terms: -32 + 20 = -12
3u = -12

Divide each side by '3'.
u = -4

Simplifying
u = -4

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