7u+3=15u-9-4

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Solution for 7u+3=15u-9-4 equation:


Simplifying
7u + 3 = 15u + -9 + -4

Reorder the terms:
3 + 7u = 15u + -9 + -4

Reorder the terms:
3 + 7u = -9 + -4 + 15u

Combine like terms: -9 + -4 = -13
3 + 7u = -13 + 15u

Solving
3 + 7u = -13 + 15u

Solving for variable 'u'.

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

Add '-15u' to each side of the equation.
3 + 7u + -15u = -13 + 15u + -15u

Combine like terms: 7u + -15u = -8u
3 + -8u = -13 + 15u + -15u

Combine like terms: 15u + -15u = 0
3 + -8u = -13 + 0
3 + -8u = -13

Add '-3' to each side of the equation.
3 + -3 + -8u = -13 + -3

Combine like terms: 3 + -3 = 0
0 + -8u = -13 + -3
-8u = -13 + -3

Combine like terms: -13 + -3 = -16
-8u = -16

Divide each side by '-8'.
u = 2

Simplifying
u = 2

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