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What does twice the product of 3 and a number exceeds the sum of the number and 80 by 10. what is that number?
let x be the number twice the product of 3 and a number means 2(3x)
the sum of the number and 80 by 10 means x+80+10 putting this altogether creates an equation
2(3x)=x+80+10 6x=x+90 (expanded the brackets on the left hand side and added 80 +10 on the left) 5x=90 (subtracted x to both sides) x=90/5 x=18 Therefore the number is 18.
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