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400-35(7)+20(-2)=x
We simplify the equation to the form, which is simple to understand
400-35(7)+20(-2)=x
Reorder the terms in parentheses
400+(-245)+20*(-2)=x
Remove unnecessary parentheses
+400-245+20+*(-2+)=+x
Reorder the terms in parentheses
400-245+(-40)=x
Remove unnecessary parentheses
+400-245-40=+x
We move all terms containing x to the left and all other terms to the right.
-1x=-400+245+40
We simplify left and right side of the equation.
-1x=-115
We divide both sides of the equation by -01 to get x.
x=115
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