Choose a number between 1 and 10. Add 4 and double the result. Subtract 3, then, multiply by 3. Subtract 5 times one more than the original number. Tell me the answer and I will tell you your original number.  Answers
A) 10x	B) x+10	C) x-10	D) x/10	E) 10-x
The calculation described in this problem is 3(2 (4+ x) -3) - 5(x + 1), we can use the Rules to rewrite the expression as follows:   = 3 (2 (4 + x) - 3) - 5(x + 1)   = 3 (8 + 2 x - 3) -5 x - 5   = 3 (2 x + 5) - 5x -5   = 6x + 15 - 5x - 5   = (6 - 5)x + 15 -5   = x + 10   Answer: x+10
<result>B</result>
Choose a number between 1 and 10. Add 4 and double the result. Subtract 3, then, multiply by 3. Subtract 5 times one more than the original number. Tell me the answer and I will tell you your original number.