Решите уравнение: 1) 8(x-14)=56 2) (46-x)•19=418 3) 9(143-13x)=234 4) 17(5x-16)=238

Question

Решите уравнение:
1) 8(x-14)=56
2) (46-x)•19=418
3) 9(143-13x)=234
4) 17(5x-16)=238

Answer 1

1) 8(x-14)=56
8х-112=56;
8х=56+112;
8х=168;
х=21
2) (46-x)•19=418
874-19х=418;
-19х=418-874;
-19х=-456;
х=24
3) 9(143-13x)=234
1287-117х=234;
-117х=234-1287;
-117х=-1053;
х=9.
4) 17(5x-16)=238;
85х-272=238;
85х=238+272;
85х=510;
х=6.