14-72:(d-3)=8
72:(d-3)=14-8
72:(d-3)= 6
d-3=72:6
d-3= 12
d=12+3
d=15
проверка
14-72:(15-3)=8
14-72:12=8
14- 6=8
8=8
(r:16)*13+11=50
(r:16)*13=50-11
(r:16)*13= 39
r:16=39:13
r:16=3
r=16*3
r= 48
(48:16)*13+11=50
3*13+11=50
39+11=50
50=50
(980:n)*18-84=276
(980 :n)*18=276+84
(980:n)*18= 360
980:n=360:18
980:n= 20
n=980:20
n= 49
(980:49)*18-84=276
20*18-84=276
360-84=276
276=276
96+(80-х):14=100
(80-х):14=100-96
(80-х):14= 4
80-х=14*4
80-х= 56
х=80-56
х= 24
96+(80-24):14=100
96+ 56:14=100
96+ 4=100
100=100
14-72:(d-3)=8
72:(d-3)=14-8
72:(d-3)= 6
d-3=72:6
d-3= 12
d=12+3
d=15
проверка
14-72:(15-3)=8
14-72:12=8
14- 6=8
8=8
(r:16)*13+11=50
(r:16)*13=50-11
(r:16)*13= 39
r:16=39:13
r:16=3
r=16*3
r= 48
проверка
(48:16)*13+11=50
3*13+11=50
39+11=50
50=50
(980:n)*18-84=276
(980 :n)*18=276+84
(980:n)*18= 360
980:n=360:18
980:n= 20
n=980:20
n= 49
проверка
(980:49)*18-84=276
20*18-84=276
360-84=276
276=276
96+(80-х):14=100
(80-х):14=100-96
(80-х):14= 4
80-х=14*4
80-х= 56
х=80-56
х= 24
проверка
96+(80-24):14=100
96+ 56:14=100
96+ 4=100
100=100