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0.7x-0.5(3-x)=3.9
We simplify the equation to the form, which is simple to understand
0.7x-0.5(3-x)=3.9
Reorder the terms in parentheses
0.7x+(-1.5 + 0.5x)=3.9
Remove unnecessary parentheses
+ 0.7x-1.5 + 0.5x=+3.9
We move all terms containing x to the left and all other terms to the right.
+ 0.7x + 0.5x=+3.9+1.5
We simplify left and right side of the equation.
+1.2x=+5.4
We divide both sides of the equation by 1.2 to get x.
x=4.5
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