Total units would be: 3+4 = 7
value of 1 unit = 28/7 = 4
ratio would be 3(4) & 4(4) = 12 & 16
-11=-5x+19y
5x-11=19y
(5x-11)/19=y
Answer:
New price =$6.60
Step-by-step explanation:

X(x+2) = 48
x^2 + 2x = 48
x^2 + 2x - 48 = 0
*Use quadratic formulae*
x = 6
Numbers are 6 and 8