Question

решите уравнение 25x-2=57

Answer 1

2/5х-2=5/7
2/5х=2+5/7
2/5х=2 5/7
х=2 5/7:2/5
х=19/7:2/5
х=95/14
х=6 11/14

2/5*95/14-2=5/7
19/7-2=5/7
2 5/7-2=5/7
5/7=5/7