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

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


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

Reorder the terms:
-1 = 5(7 + u) + 7u
-1 = (7 * 5 + u * 5) + 7u
-1 = (35 + 5u) + 7u

Combine like terms: 5u + 7u = 12u
-1 = 35 + 12u

Solving
-1 = 35 + 12u

Solving for variable 'u'.

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

Add '-12u' to each side of the equation.
-1 + -12u = 35 + 12u + -12u

Combine like terms: 12u + -12u = 0
-1 + -12u = 35 + 0
-1 + -12u = 35

Add '1' to each side of the equation.
-1 + 1 + -12u = 35 + 1

Combine like terms: -1 + 1 = 0
0 + -12u = 35 + 1
-12u = 35 + 1

Combine like terms: 35 + 1 = 36
-12u = 36

Divide each side by '-12'.
u = -3

Simplifying
u = -3

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