Answer :
x = 2y + 10
x + y = 7
(2y + 10) + y = 70
3y = 70 - 10
3y = 60
y = 60/3
y = 20
x = 2(20) + 10 = 40 + 10 = 50
50 and 20
x + y = 7
(2y + 10) + y = 70
3y = 70 - 10
3y = 60
y = 60/3
y = 20
x = 2(20) + 10 = 40 + 10 = 50
50 and 20