-0.4(x+3)=4

Solution for -0.4(x+3)=4 equation:

Simplifying
-0.4(x + 3) = 4

Reorder the terms:
-0.4(3 + x) = 4
(3 * -0.4 + x * -0.4) = 4
(-1.2 + -0.4x) = 4

Solving
-1.2 + -0.4x = 4

Solving for variable 'x'.

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

Add '1.2' to each side of the equation.
-1.2 + 1.2 + -0.4x = 4 + 1.2

Combine like terms: -1.2 + 1.2 = 0.0
0.0 + -0.4x = 4 + 1.2
-0.4x = 4 + 1.2

Combine like terms: 4 + 1.2 = 5.2
-0.4x = 5.2

Divide each side by '-0.4'.
x = -13

Simplifying
x = -13