3*5-12=Y

Solution for 3*5-12=Y equation:

Simplifying
3 * 5 + -12 = Y

Multiply 3 * 5
15 + -12 = Y

Combine like terms: 15 + -12 = 3
3 = Y

Solving
3 = 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.
3 + -1Y = Y + -1Y

Combine like terms: Y + -1Y = 0
3 + -1Y = 0

Add '-3' to each side of the equation.
3 + -3 + -1Y = 0 + -3

Combine like terms: 3 + -3 = 0
0 + -1Y = 0 + -3
-1Y = 0 + -3

Combine like terms: 0 + -3 = -3
-1Y = -3

Divide each side by '-1'.
Y = 3

Simplifying
Y = 3