x + 60 = 30 + 80
x + 60 = 110
x = 110 - 60
x = 50
x + 60 = 30 + 80
x + 60 = 110
x = 110 - 60
x = 50
k nhé
phamthiminhtrangx + 60 = 30 + 80
x + 60 = 110
x = 110 - 60
x = 50
x + 60 = 30 + 80
x + 60 = 110
x = 110 - 60
x = 50
x + 60 =30 +80
x + 60 =110
x=110-60
x=50
tk nha