-1=5(u+3)-7u

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Solution for -1=5(u+3)-7u equation:


Simplifying
-1 = 5(u + 3) + -7u

Reorder the terms:
-1 = 5(3 + u) + -7u
-1 = (3 * 5 + u * 5) + -7u
-1 = (15 + 5u) + -7u

Combine like terms: 5u + -7u = -2u
-1 = 15 + -2u

Solving
-1 = 15 + -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.
-1 + 2u = 15 + -2u + 2u

Combine like terms: -2u + 2u = 0
-1 + 2u = 15 + 0
-1 + 2u = 15

Add '1' to each side of the equation.
-1 + 1 + 2u = 15 + 1

Combine like terms: -1 + 1 = 0
0 + 2u = 15 + 1
2u = 15 + 1

Combine like terms: 15 + 1 = 16
2u = 16

Divide each side by '2'.
u = 8

Simplifying
u = 8

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