-1=2u+5(u+4)

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Solution for -1=2u+5(u+4) equation:


Simplifying
-1 = 2u + 5(u + 4)

Reorder the terms:
-1 = 2u + 5(4 + u)
-1 = 2u + (4 * 5 + u * 5)
-1 = 2u + (20 + 5u)

Reorder the terms:
-1 = 20 + 2u + 5u

Combine like terms: 2u + 5u = 7u
-1 = 20 + 7u

Solving
-1 = 20 + 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.
-1 + -7u = 20 + 7u + -7u

Combine like terms: 7u + -7u = 0
-1 + -7u = 20 + 0
-1 + -7u = 20

Add '1' to each side of the equation.
-1 + 1 + -7u = 20 + 1

Combine like terms: -1 + 1 = 0
0 + -7u = 20 + 1
-7u = 20 + 1

Combine like terms: 20 + 1 = 21
-7u = 21

Divide each side by '-7'.
u = -3

Simplifying
u = -3

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