x-40=80
x=80+40
x=120
x-80=100
x=100+80
x=180
chắc 100% luôn
\(x-40=80\)
\(x=80+40\)
\(x=120\)
\(x-80=100\)
\(x=100+80\)
\(x=180\)
x - 40 = 80 x - 80 = 100
x = 80 + 40 x = 100 + 80
x = 120 x = 180
+ x-40=80
x=80+40
x=120
+ x-80=100
x=100+80
x=180
x - 40 = 80
x = 80 + 40
x = 120
x - 80 = 100
x = 100 + 80
x = 180
x-40=80 x-80=100
x =80+40 x =100+80
x =120 x =180
x - 40 = 80
x = 80 + 40
x = 120
x - 80 = 100
x = 100 + 80
x = 180