Directions: Using the digits 1 to 9 at most one time each, fill in the boxes to find the largest (or smallest) possible values for the sum of x and y.

### Hint

### Hint

Where do you want to put the largest numbers? Where should you put the 1 and the 2?

### Answer

### Answer

The largest value is 19 which can be achieved by the following:

1x-8=9 and 2y+3=7

1x-8=9 and 2y+3=7

The smallest value is -6.125 which can be achieved by the following:

8x-3=4 and 1y+9=2

Source: Erick Lee

Just a note that the second equation with the y value should have a subtraction sign vice an addition sign in order for the solution to be correct. (__y – __ = __)

Sorry, I mean the first equation with the x. oops.

Thanks for the heads up. I just fixed it.