Section: Math

37) If three times a number is equal to that number minus 7, what is the number?

1. -1.5
2. 1.5
3. -3.5
4. 3.5

Let "a number" be x. Three times this is 3x. This is equal to x-7 (3x=x-7). Add a -x to isolate the number. This leaves you with 2x=-7. Divide by 2, and you're left with x=-3.5.