Х -19=72 ,3 *х =18 ,12+х =81 ,х :6=48
X-19=72 x=72+19 x=91; 3*x=18 x=18:3 x=6; 12+x=81 x=81-12 x=69; x:6=48 x=48*6 x=288
1)x=91. 2)x=6. 3)x=69. 4)x=288