Question

tell question 16 plz

Answer 1

given
x:y = 1:2
x/y = 1/2
2x = y
x= y/2
(2x+3y)/(x+4y) = (y + 3y)/(y/2 + 4y)
                        = 4y / (y+8y)/2
                        = 4y x 2 / 9y
                         = 8y/9y = 8:9
therefore, 2x+3y : x+4y = 8:9

Answer 2

$2x + 3y \div x + 4y = 1 \div 2$