Question

GIÚP MIK VỚI MIK ĐANG CẦN GẤP 

Answer 1

1: x-1/2=3/8

=>x=3/8+1/2

=>x=3/8+4/8=7/8

2: x+1/5=3-3/2

=>x+1/5=3/2

=>x=3/2-1/5=15/10-2/10=13/10

3: =>x*1/12=2/3-1/4=8/12-3/12=5/12

=>x=5

4: =>2x-9=21

=>2x=30

=>x=15