Respuesta :

$10 can buy = 3 cans

$1 can buy=3/10 cans

$40 can buy =(3/10)*40=12 cans

Answer:

He bought 12 cans of soup

Step-by-step explanation:

We can use a ratio to solve this problem.

$10            $40

----------- = --------------

3 cans        x cans


Using cross products

10* x = 3 * 40

10x = 120

Divide by 10

10x/10 = 120/10

x = 12

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