Answer:
He can buy both 3 ( number of ) Products A and B .
Step-by-step explanation:
Suppose the no of product A bought is x and the number of product B purchased is y .
Then Total Cost would be 4x+ 5y= 27 ----eq 1
As he wants to buy both products he can divide the money equally
1:1.
As the individual cost would be $4 + $5 = $ 9
Putting symbols for cost x+ y= 9----- eq 2
Dividing the total cost by the individual cost would give ( eq1 by eq2)
4x+ 5y/ x+ y= 27/9
4x+ 5y/ x+y= 3
4x + 5y= 3(x+y)
but as 4x + 5y = 27 ( already given)
27= 3 ( x+y)
Meaning 3 number of both products can be purchased.
Check .
4(3) + 5(3)= 27
$ 12+ $ 15= $27