7u-5=9u-15

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


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

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

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

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

Solving for variable 'u'.

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

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

Combine like terms: 7u + -9u = -2u
-5 + -2u = -15 + 9u + -9u

Combine like terms: 9u + -9u = 0
-5 + -2u = -15 + 0
-5 + -2u = -15

Add '5' to each side of the equation.
-5 + 5 + -2u = -15 + 5

Combine like terms: -5 + 5 = 0
0 + -2u = -15 + 5
-2u = -15 + 5

Combine like terms: -15 + 5 = -10
-2u = -10

Divide each side by '-2'.
u = 5

Simplifying
u = 5

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