0.4(x-4)=7.2

Solution for 0.4(x-4)=7.2 equation:

Simplifying
0.4(x + -4) = 7.2

Reorder the terms:
0.4(-4 + x) = 7.2
(-4 * 0.4 + x * 0.4) = 7.2
(-1.6 + 0.4x) = 7.2

Solving
-1.6 + 0.4x = 7.2

Solving for variable 'x'.

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

Add '1.6' to each side of the equation.
-1.6 + 1.6 + 0.4x = 7.2 + 1.6

Combine like terms: -1.6 + 1.6 = 0.0
0.0 + 0.4x = 7.2 + 1.6
0.4x = 7.2 + 1.6

Combine like terms: 7.2 + 1.6 = 8.8
0.4x = 8.8

Divide each side by '0.4'.
x = 22

Simplifying
x = 22