Question

determine x e y na proporção x/y=3/4 , sabendo x+y=28

Answer 1

x=3/4y

3/4y+y=28
3/4y+4y/4=112/4
3y+4y=112
7y=112
y=16

x=3/4.(16)
x=48/4
x=12

x=12, y=16