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170x+60(21-x)=1810
We simplify the equation to the form, which is simple to understand
170x+60(21-x)=1810
Reorder the terms in parentheses
170x+(+1260-60x)=1810
Remove unnecessary parentheses
+170x+1260-60x=+1810
We move all terms containing x to the left and all other terms to the right.
+170x-60x=+1810-1260
We simplify left and right side of the equation.
+110x=+550
We divide both sides of the equation by 110 to get x.
x=5
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