3u+9=7u+13

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Solution for 3u+9=7u+13 equation:


Simplifying
3u + 9 = 7u + 13

Reorder the terms:
9 + 3u = 7u + 13

Reorder the terms:
9 + 3u = 13 + 7u

Solving
9 + 3u = 13 + 7u

Solving for variable 'u'.

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

Add '-7u' to each side of the equation.
9 + 3u + -7u = 13 + 7u + -7u

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

Combine like terms: 7u + -7u = 0
9 + -4u = 13 + 0
9 + -4u = 13

Add '-9' to each side of the equation.
9 + -9 + -4u = 13 + -9

Combine like terms: 9 + -9 = 0
0 + -4u = 13 + -9
-4u = 13 + -9

Combine like terms: 13 + -9 = 4
-4u = 4

Divide each side by '-4'.
u = -1

Simplifying
u = -1

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