-9u-15=-5u-7

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Solution for -9u-15=-5u-7 equation:


Simplifying
-9u + -15 = -5u + -7

Reorder the terms:
-15 + -9u = -5u + -7

Reorder the terms:
-15 + -9u = -7 + -5u

Solving
-15 + -9u = -7 + -5u

Solving for variable 'u'.

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

Add '5u' to each side of the equation.
-15 + -9u + 5u = -7 + -5u + 5u

Combine like terms: -9u + 5u = -4u
-15 + -4u = -7 + -5u + 5u

Combine like terms: -5u + 5u = 0
-15 + -4u = -7 + 0
-15 + -4u = -7

Add '15' to each side of the equation.
-15 + 15 + -4u = -7 + 15

Combine like terms: -15 + 15 = 0
0 + -4u = -7 + 15
-4u = -7 + 15

Combine like terms: -7 + 15 = 8
-4u = 8

Divide each side by '-4'.
u = -2

Simplifying
u = -2

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