What will be the number if seven is added to a certain number, the sum is multiplied by five, and the product us divided by nine, then three is subtracted from the quotient and the remainder left is twelve?
A. 10 B. 20 C. 40 D. 25
Correct Answer: B
Explanation
Let the number be \(x\) from the sentence we have \(\frac{(x+7) \times 5}{9}-3=12\) \(\frac{5(x+7)}{9}=12+3\) \(\frac{5(x+7)}{9}=15, \quad 5(x+7)=15 \times 15\) \(5(x+7)=135\) Divide through by 5 \((x+7)=27, x=27-7=20\)
