0.40*3=y

Solution for 0.40*3=y equation:

Simplifying
0.40 * 3 = y

Multiply 0.40 * 3
1.2 = y

Solving
1.2 = 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.
1.2 + -1y = y + -1y

Combine like terms: y + -1y = 0
1.2 + -1y = 0

Add '-1.2' to each side of the equation.
1.2 + -1.2 + -1y = 0 + -1.2

Combine like terms: 1.2 + -1.2 = 0.0
0.0 + -1y = 0 + -1.2
-1y = 0 + -1.2

Combine like terms: 0 + -1.2 = -1.2
-1y = -1.2

Divide each side by '-1'.
y = 1.2

Simplifying
y = 1.2