Answer: 18
Step-by-step explanation:
If she paid $12 for 2 cans.
Let, cost of 1 can be, $x
thus, cost of 2 cans= 2x
but, given 2x= 12
x=$6 ( cost of 1 can)
Now, cost of 3 cans= 3× 6=$18
(amount she has to pay for 3 cans)
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