Question

x:y = 3:8 find (5x+7y) : (8x+11y)
if dont know don't answer!​

Answer 1

x:y = 3:8
Let the constant ratios be a
x = 3a
y = 8a

Solution to be found = 5x+7y : 8x+11y
= 5(3a) + 7(8a) : 8(3a) + 11(8a)
= 15a + 56a : 24a + 88a
= 71a : 112a