Question

Alex stocks up for winter. He buys 32 cans of vegetables. He pays 80 cents per can for tomatoes and 40 cents per can for corn, for a total cost of $18.00. How many cans of corn does he buy?

Answer 1

80x+40y=1800
80x+40y=32


get x alone:
80x=32-40y
x=(32-40y)/80

plug it in to solve for y:
80{(32-40y)/80}+40y=32
I don't know what to do after that o.o