20=5(u+8)-7u

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


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

Reorder the terms:
20 = 5(8 + u) + -7u
20 = (8 * 5 + u * 5) + -7u
20 = (40 + 5u) + -7u

Combine like terms: 5u + -7u = -2u
20 = 40 + -2u

Solving
20 = 40 + -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.
20 + 2u = 40 + -2u + 2u

Combine like terms: -2u + 2u = 0
20 + 2u = 40 + 0
20 + 2u = 40

Add '-20' to each side of the equation.
20 + -20 + 2u = 40 + -20

Combine like terms: 20 + -20 = 0
0 + 2u = 40 + -20
2u = 40 + -20

Combine like terms: 40 + -20 = 20
2u = 20

Divide each side by '2'.
u = 10

Simplifying
u = 10

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