4(x-9)=-21.6

Solution for 4(x-9)=-21.6 equation:

Simplifying
4(x + -9) = -21.6

Reorder the terms:
4(-9 + x) = -21.6
(-9 * 4 + x * 4) = -21.6
(-36 + 4x) = -21.6

Solving
-36 + 4x = -21.6

Solving for variable 'x'.

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

Add '36' to each side of the equation.
-36 + 36 + 4x = -21.6 + 36

Combine like terms: -36 + 36 = 0
0 + 4x = -21.6 + 36
4x = -21.6 + 36

Combine like terms: -21.6 + 36 = 14.4
4x = 14.4

Divide each side by '4'.
x = 3.6

Simplifying
x = 3.6