Question

Can you help me with this problem

Answer 1

System:
 $\left \{ {{x+y=11} \atop {x+1.75y=14}} \right.$

x+y=11

x=11-y then 11-y+1.75y=14
0.75y=14-11=3
y=4 - orange juice
x=11-4=7 - apple juice

if you wanna use a graphic method you should draw the lines of each equation. The intersection of these lines is solution

Answer 2

4 apple juice and 4 Orange juice because 1.75 x 4=7 and 4 x 1 = 4. So 7+4=11 so you bought 4 bottles of orange juice and 4 bottles of Apple juice