X
+
5
y
=
20
x
+
3
y
=
14

x = 28/97

y = 532/

Step-by-step explanation:

x + 5y = 20x + 3y

=> 5y - 3y = 20x - x

=> 2y = 19x

=> y = (19x)/2

x + 5y = 14

=> x + 5((19x)/2) = 14

=> x + (95x)/2 = 14

=> (2x + 95x)/2 = 14

=> 97x = 14(2)

=> 97x = 28

=> x = 28/97

=>y = (19x)/2 = (19(28))/(97(2)) = 532/194

answer: bearing in mind that a rectangle has a perimeter of length + length + width + width.

step-by-step explanation:

p = perimeter

l = length

x=width

p = 2l + 2x

p = 2(l+x)     < ==== perimeter of the base of the box.