3u+9=7(u+7)

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Solution for 3u+9=7(u+7) equation:


Simplifying
3u + 9 = 7(u + 7)

Reorder the terms:
9 + 3u = 7(u + 7)

Reorder the terms:
9 + 3u = 7(7 + u)
9 + 3u = (7 * 7 + u * 7)
9 + 3u = (49 + 7u)

Solving
9 + 3u = 49 + 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 = 49 + 7u + -7u

Combine like terms: 3u + -7u = -4u
9 + -4u = 49 + 7u + -7u

Combine like terms: 7u + -7u = 0
9 + -4u = 49 + 0
9 + -4u = 49

Add '-9' to each side of the equation.
9 + -9 + -4u = 49 + -9

Combine like terms: 9 + -9 = 0
0 + -4u = 49 + -9
-4u = 49 + -9

Combine like terms: 49 + -9 = 40
-4u = 40

Divide each side by '-4'.
u = -10

Simplifying
u = -10

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