13 - x + 72 = 60 x 2
13 - x + 72 = 120
12 - x = 120 - 72
12 - x = 48
x= 12 - 48
x= -36
13 - x + 72 =60 x 2
13 - x + 72 = 120
13 - x = 120 - 72
13 - x = 48
x = 13 - 48
x = -35
Vậy: x = -35
13-x+72=60x2
13-x+72=120
13-x=120-72
13-x=48
x=13-48
x=-35
c nha
13 - x + 72 = 60 x 2
13 - x + 72 = 120
13 - x = 120 - 72
13 - x = 48
x = 48 - 13
x = 35
13 - x + 72 = 60 x 2
13 - x + 72 = 120
13 - x = 120 - 72
13 - x = 48
x = 13 - 48
x = -35