<span>215x=1720
х=1720:215
х=8
</span>
<span>y:125=9
у=9*125
у=1125
1826-14x=1252
14х=1826-1252
14х=574
х=574:14
х=41
416:z+24=50</span>
416:z=50-24
416:z=26
z=416:26
z=16
(х-31+48)-(31-4)+(11-8+34)=48
х-31+48-31+4+11-8+34=48
х+27=48
х=48-27
х=21
46800 |3 1 1
15600
-3 | * 2
---- ------------ ----------
16 15600 31200
- 15
-----------
18
-18
1) 2020-1503=517
2)300*517=155100
3)113*70=7910
4)150200+155100=305300
5)305300-7910=297390