Question

№162 помогите срочно

Answer 1

1)
1-3/5=5/5-3/5=2/5
1/(2/5)=1*5/2=2 1/2
х-1=2 1/2
х=2 1/2+1
х= 3 1/2=3,5

2) 4-1 1/2=8/2-3/2=5/2
2:5/2=2*2/5=4/5
х-2=4/5
х=4/5+2
х=2 4/5=2,8

3.
2+1 1/3=6/3+4/3=10/3
3: 10/3=3*3/10=9/10
х-3=9/10
х=9/10+3=3 9/10=3,9