It's the same as multiplying a number by 1.5
-18 + x = 11
+18. +18
--------------------
x = 29
Answer is 10 11/35
Because here you are finding an unknown, so you redo the problem.
The problem tells you to divide so the opposite is times the number
so 2 5/7 times 3 4/5 is 10 11/35
Your answer would be $18 for 6 cans of cat food
