-13=7+4u

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Solution for -13=7+4u equation:


Simplifying
-13 = 7 + 4u

Solving
-13 = 7 + 4u

Solving for variable 'u'.

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

Add '-4u' to each side of the equation.
-13 + -4u = 7 + 4u + -4u

Combine like terms: 4u + -4u = 0
-13 + -4u = 7 + 0
-13 + -4u = 7

Add '13' to each side of the equation.
-13 + 13 + -4u = 7 + 13

Combine like terms: -13 + 13 = 0
0 + -4u = 7 + 13
-4u = 7 + 13

Combine like terms: 7 + 13 = 20
-4u = 20

Divide each side by '-4'.
u = -5

Simplifying
u = -5

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