4.3-(-8.1)=3.6+x

Solution for 4.3-(-8.1)=3.6+x equation:

Simplifying
4.3 + -1(-8.1) = 3.6 + x

Multiply -1 * -8.1
4.3 + 8.1 = 3.6 + x

Combine like terms: 4.3 + 8.1 = 12.4
12.4 = 3.6 + x

Solving
12.4 = 3.6 + 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.
12.4 + -1x = 3.6 + x + -1x

Combine like terms: x + -1x = 0
12.4 + -1x = 3.6 + 0
12.4 + -1x = 3.6

Add '-12.4' to each side of the equation.
12.4 + -12.4 + -1x = 3.6 + -12.4

Combine like terms: 12.4 + -12.4 = 0.0
0.0 + -1x = 3.6 + -12.4
-1x = 3.6 + -12.4

Combine like terms: 3.6 + -12.4 = -8.8
-1x = -8.8

Divide each side by '-1'.
x = 8.8

Simplifying
x = 8.8