Пошаговое объяснение:
1) 8 (x – 14) = 56
х-14=56:8
х-14=7
х=7+14
х=21
8*(21-14)=56
8*7=56
56=56
2) (46 – x) • 19 = 418;
46-х=418:19
46-х= 22
х=46-22
х=24
(46-24)*19=418
22*19=418
418=418
3) 9 (143 - 13x) = 234;
143-13х=234:9
143-13х= 26
13х=143-26
13х= 117
х=117:13
х= 9
9(143 -13*9)=234
9*(143- 117)=234
9*26=234
4) 17 (5x - 16) = 238.
5х-16=238:17
5х-16=14
5х=14+16
5х=30
х=30:5
х=6
17(5*6-16)=238
17(30-16)=238
17*14=238
238=238
1)x=21
x-14=7
x=7+14
2)x=24
874-19x=418
-19x=418-874
-19x=-456
3)x=9
-13x=26-143
-13x=-117
4)x=6
5x=14+16
5x=30
x=30÷5
