0.4(-0.8)=x

Solution for 0.4(-0.8)=x equation:

Simplifying
0.4(-0.8) = x

Multiply 0.4 * -0.8
-0.32 = x

Solving
-0.32 = x

Solving for variable 'x'.

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

Add '-1x' to each side of the equation.
-0.32 + -1x = x + -1x

Combine like terms: x + -1x = 0
-0.32 + -1x = 0

Add '0.32' to each side of the equation.
-0.32 + 0.32 + -1x = 0 + 0.32

Combine like terms: -0.32 + 0.32 = 0.00
0.00 + -1x = 0 + 0.32
-1x = 0 + 0.32

Combine like terms: 0 + 0.32 = 0.32
-1x = 0.32

Divide each side by '-1'.
x = -0.32

Simplifying
x = -0.32