8(x-14=56 (46-x)•19=418 9(143-13x)=234 17(5x-16)=238 - вопрос №203262081456461941891431323417516238 от сабина419 29.05.2021 14:20

Question

Математика: 8(x-14=56 (46-x)•19=418 9(143-13x)=234 17(5x-16)=238

сабина419 · Answer

1) 8(9х-14)=56
72х-112=56
72х=56+112
72х=168
х=168:72
x=

   2)(46-х)19=418
19(46-х)=418
874-19х=418
19х=874-418
19х=456
х=456:19
х=24
   3) 9(143-13х)=234
1 287-117х=234
117х=1 287-234
117х=1 053
х=1 053:117
х=9
9(143-13·9)=234
9(143-117)=234
9·26=234
4) 17(5х-16)=238
85х-272=238
85х=238+272
85х=510
х=510:85
х=6
17(5·6-16)=238
17(30-16)=238
17·14=238
8(x-14=56 (46-x)•19=418 9(143-13x)=234 17(5x-16)=238

8(x-14=56 (46-x)•19=418 9(143-13x)=234 17(5x-16)=238