Answer:
x=4
Explanation:
13.9-2x=5.9
We simplify the equation to the form, which is simple to understand
13.9-2x=5.9
We move all terms containing x to the left and all other terms to the right.
-2x=+5.9-13.9
We simplify left and right side of the equation.
-2x=-8
We divide both sides of the equation by -2 to get x.
x=4