1)13x=195;
x=195:13
x=15;
2)x*18=468;
x=468:18;
x=26;
3)x:19=26
x=26*19;
x=494;
4)476:x=14
x=476:14;
x=34;
13 х=195
х =195:13
х=15
13х15=195
195=195 х
х х18=468
х=468:18
х=26
26 х18= 46
468 =468
