.4y+-2(3+-y)=1.8

Solution for .4y+-2(3+-y)=1.8 equation:

Simplifying
0.4y + -2(3 + -1y) = 1.8
0.4y + (3 * -2 + -1y * -2) = 1.8
0.4y + (-6 + 2y) = 1.8

Reorder the terms:
-6 + 0.4y + 2y = 1.8

Combine like terms: 0.4y + 2y = 2.4y
-6 + 2.4y = 1.8

Solving
-6 + 2.4y = 1.8

Solving for variable 'y'.

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

Add '6' to each side of the equation.
-6 + 6 + 2.4y = 1.8 + 6

Combine like terms: -6 + 6 = 0
0 + 2.4y = 1.8 + 6
2.4y = 1.8 + 6

Combine like terms: 1.8 + 6 = 7.8
2.4y = 7.8

Divide each side by '2.4'.
y = 3.25

Simplifying
y = 3.25