12*3=9u

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Solution for 12*3=9u equation:


Simplifying
12 * 3 = 9u

Multiply 12 * 3
36 = 9u

Solving
36 = 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.
36 + -9u = 9u + -9u

Combine like terms: 9u + -9u = 0
36 + -9u = 0

Add '-36' to each side of the equation.
36 + -36 + -9u = 0 + -36

Combine like terms: 36 + -36 = 0
0 + -9u = 0 + -36
-9u = 0 + -36

Combine like terms: 0 + -36 = -36
-9u = -36

Divide each side by '-9'.
u = 4

Simplifying
u = 4

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