0.4+.8(4)=0.5(y+4)

Solution for 0.4+.8(4)=0.5(y+4) equation:

Simplifying
0.4 + 0.8(4) = 0.5(y + 4)

Multiply 0.8 * 4
0.4 + 3.2 = 0.5(y + 4)

Combine like terms: 0.4 + 3.2 = 3.6
3.6 = 0.5(y + 4)

Reorder the terms:
3.6 = 0.5(4 + y)
3.6 = (4 * 0.5 + y * 0.5)
3.6 = (2 + 0.5y)

Solving
3.6 = 2 + 0.5y

Solving for variable 'y'.

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

Add '-0.5y' to each side of the equation.
3.6 + -0.5y = 2 + 0.5y + -0.5y

Combine like terms: 0.5y + -0.5y = 0.0
3.6 + -0.5y = 2 + 0.0
3.6 + -0.5y = 2

Add '-3.6' to each side of the equation.
3.6 + -3.6 + -0.5y = 2 + -3.6

Combine like terms: 3.6 + -3.6 = 0.0
0.0 + -0.5y = 2 + -3.6
-0.5y = 2 + -3.6

Combine like terms: 2 + -3.6 = -1.6
-0.5y = -1.6

Divide each side by '-0.5'.
y = 3.2

Simplifying
y = 3.2