Question

Tim thought of a number, x. he multiplied x by 15:and then subtracted 3. and then Tim told Jim the result, y.

Write a formula that will help Jim quickly find Tim’s number if he knows the value of y.

Answer 1

Answer: x = (y+3)/15.

Explanation:

We know that 15x - 3 = y.

We can add 3 to both sides:

15x = y + 3

We can divide both sides by 15:

x = (y+3)/15.

Therefore, if given y, we can find x by computing (y+3)/15.