If 10 is added to thrice a number and this sum is multiplied by 5, the result is the same as if the number is multiplied by 5 and 13 is added to the product. What is the number?
Choose the correct choice from the following answers:
A) -3.5  B) -3.7  C) -5  D) -9  E) 11
let the number be x;   5(10+3x)=5x+13;   x=-3.7   ANSWER:-3.7
<result>B</result>
If 10 is added to thrice a number and this sum is multiplied by 5, the result is the same as if the number is multiplied by 5 and 13 is added to the product. What is the number?