Problema Solution
Jon buys fencing for his yard. He pays $122 for 5 fence posts and 4 fence panels. He pays $570 for 21 fence posts and 20 fence panels. How much does he pay for 4 fence posts and 3 fence panels?
Answer provided by our tutors
let 'p' represent the cost per post and 'f' represent the cost per fence panel
we have these equations:
122 = 5p + 4f
570 = 21p + 20f
solving this system we obtain:
f = 18
p = 10
the cost per post is $10, the cost per fence panel is $18
4 fence posts and 3 fence panels would cost:
4*10 + 3*18 = 94
$94 would be the cost for 4 fence posts and 3 fence panels