3(12)+9=y

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Solution for 3(12)+9=y equation:


Simplifying
3(12) + 9 = y

Multiply 3 * 12
36 + 9 = y

Combine like terms: 36 + 9 = 45
45 = y

Solving
45 = y

Solving for variable 'y'.

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

Add '-1y' to each side of the equation.
45 + -1y = y + -1y

Combine like terms: y + -1y = 0
45 + -1y = 0

Add '-45' to each side of the equation.
45 + -45 + -1y = 0 + -45

Combine like terms: 45 + -45 = 0
0 + -1y = 0 + -45
-1y = 0 + -45

Combine like terms: 0 + -45 = -45
-1y = -45

Divide each side by '-1'.
y = 45

Simplifying
y = 45

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