63=3u+6u

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Solution for 63=3u+6u equation:


Simplifying
63 = 3u + 6u

Combine like terms: 3u + 6u = 9u
63 = 9u

Solving
63 = 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.
63 + -9u = 9u + -9u

Combine like terms: 9u + -9u = 0
63 + -9u = 0

Add '-63' to each side of the equation.
63 + -63 + -9u = 0 + -63

Combine like terms: 63 + -63 = 0
0 + -9u = 0 + -63
-9u = 0 + -63

Combine like terms: 0 + -63 = -63
-9u = -63

Divide each side by '-9'.
u = 7

Simplifying
u = 7

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