3u+21+7u+9=50

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Solution for 3u+21+7u+9=50 equation:


Simplifying
3u + 21 + 7u + 9 = 50

Reorder the terms:
21 + 9 + 3u + 7u = 50

Combine like terms: 21 + 9 = 30
30 + 3u + 7u = 50

Combine like terms: 3u + 7u = 10u
30 + 10u = 50

Solving
30 + 10u = 50

Solving for variable 'u'.

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

Add '-30' to each side of the equation.
30 + -30 + 10u = 50 + -30

Combine like terms: 30 + -30 = 0
0 + 10u = 50 + -30
10u = 50 + -30

Combine like terms: 50 + -30 = 20
10u = 20

Divide each side by '10'.
u = 2

Simplifying
u = 2

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