Problema Solution
$122 for 5 fence posts and 4 fence panels. 570 for 21 fence post and 20 fence panels. How much does he pay for fence posts and 20 fence panels?
Answer provided by our tutors
let
x = the cost of a fence post
y = the cost of a fence panel
122 for 5 fence posts and 4 fence panels
5x + 4y = 122
570 for 21 fence post and 20 fence panels
21x + 20y = 750
by solving the system of equations
5x + 4y = 122
21x + 20y = 750
we find
x = -35
y = 74.25
click here to see the step by step solution of the equation
we got negative price for the fence post this means that you can get a free fence post and 35$ back for each fence
the cost of a fence panel is $74.25
the cost of 20 fence panels is 20*74.25= $1,485