Х/25-7/25=13/25; 15/63-(22/63-х/63)=43/63; 4 7/19-(х+1 - вопрос №582252225725132515632263634363471914191919 от polina7snoy 14.12.2020 02:46

Question

Математика: Х/25-7/25=13/25; 15/63-(22/63-х/63)=43/63; 4 7/19-(х+1 4/19)=1 9/19;

polina7snoy · Answer

1)x/25-7/25=13/25
x/25=13/25+7/25
x=20/25 или 4/5
2)15/63-(22/63-х/63=43/63
-22/63+х/63=43/63-15/63
-22/63+х/63=28/63
х/63=28/63+22/63
х/63=50/63
3)47/19-(x+14/19)=19/19
-x-14/19= -28/19
-х= -28/19+14/19
-x= -14/19
x=14/19