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9(9x-15)-21(100-17x)=-1359
We simplify the equation to the form, which is simple to understand
9(9x-15)-21(100-17x)=-1359
Reorder the terms in parentheses
+(+81x-135)-21*(100-17x)=-1359
Remove unnecessary parentheses
+81x-135-21+*(+100-17x+)=-1359
Reorder the terms in parentheses
+81x-135+(-2100+357x)=-1359
Remove unnecessary parentheses
+81x-135-2100+357x=-1359
We move all terms containing x to the left and all other terms to the right.
+81x+357x=-1359+135+2100
We simplify left and right side of the equation.
+438x=+876
We divide both sides of the equation by 438 to get x.
x=2
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