3-6х+9х во второй-5у+10ху-15х
во второй у
1) 24 : 8 = 3
2) 54 : 9 = 6
3) 6 + 3 = 9
4) 63 : 7 = 9
5) 72 : 8 = 9
6) 9 * 9 =81
7) 4 * 9 = 36
8) 36 : 6 = 6
9) 81 - 6 = 75
1. 1567*235=369245
2. 369245-829=367416
3. 368416+487=367903
4.368903-45=367858
8,42+3,17-х= (8,42+3,17)-х=11,59-х