Question

sabendo que x+y é igual 22 calcule o valor de x na proporção x/y =2/4

Answer 1

22+y/22=2+4/2
44+2y=132
2y=88
y=44

x/44=2/4
2/4=1/2

x/44=1/2
2x=44
x=22

Answer 2

x+y=22
isolando : x=22-y
x/y=2/4
22-y/y=2/4
2y= (22-y).4
2y= 88-4y
2y+4y=88
6y=88
y=14,66...

Então x:

x/y=2/4
x/14,66=2/4
4x=14,66.2
4x=29,33
x=7,33...
 
Conferindo: x+y = 22
7,33... + 14,66... =21,99... ≈ 22