-6.4-(-7.9)=x

Solution for -6.4-(-7.9)=x equation:

Simplifying
-6.4 + -1(-7.9) = x

Multiply -1 * -7.9
-6.4 + 7.9 = x

Combine like terms: -6.4 + 7.9 = 1.5
1.5 = x

Solving
1.5 = 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.
1.5 + -1x = x + -1x

Combine like terms: x + -1x = 0
1.5 + -1x = 0

Add '-1.5' to each side of the equation.
1.5 + -1.5 + -1x = 0 + -1.5

Combine like terms: 1.5 + -1.5 = 0.0
0.0 + -1x = 0 + -1.5
-1x = 0 + -1.5

Combine like terms: 0 + -1.5 = -1.5
-1x = -1.5

Divide each side by '-1'.
x = 1.5

Simplifying
x = 1.5