Question

What was the initial amount of water in a barrel, in liters, if there are now x liters, y liters were lost, and 6 liters were added? Pls explain
A)x-y+6
B)y-x+6
C)x+y+6
D)y+x-6

Answer 1

The easiest way to start this problem is to note the number of liters in the barrel right now.

That's x

You add 6 liters to that amount

You get x + 6

From that y liters are lost.

Now your total is

x + 6 - y.

If you switch the order (which you should) you get

x - y + 6

Answer: A