30=75-1.5y

Solution for 30=75-1.5y equation:

Simplifying
30 = 75 + -1.5y

Solving
30 = 75 + -1.5y

Solving for variable 'y'.

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

Add '1.5y' to each side of the equation.
30 + 1.5y = 75 + -1.5y + 1.5y

Combine like terms: -1.5y + 1.5y = 0.0
30 + 1.5y = 75 + 0.0
30 + 1.5y = 75

Add '-30' to each side of the equation.
30 + -30 + 1.5y = 75 + -30

Combine like terms: 30 + -30 = 0
0 + 1.5y = 75 + -30
1.5y = 75 + -30

Combine like terms: 75 + -30 = 45
1.5y = 45

Divide each side by '1.5'.
y = 30

Simplifying
y = 30