40:
1: 5(x-7)=0
=>x-7=0
=>x=7
2: 25(x-4)=0
=>x-4=0
=>x=4
3: =>2x-6=0
=>2x=6
=>x=3
4: =>3x-12=0
=>x-4=0
=>x=4
5: =>5x-15=0
=>x-3=0
=>x=3
6: =>4x-24=0
=>x-6=0
=>x=6
7: =>6x-12=0
=>6x=12
=>x=2
8: =>15x-45=0
=>x-3=0
=>x=3
9: =>17x-34=0
=>17x=34
=>x=2
10: =>9x-27=0
=>x-3=0
=>x=3
11; =>15-x=5
=>x=10
12: =>24-x=23
=>x=1
13: =>2(x-5)=42
=>x-5=21
=>x=26
14: =>3(x+7)=42
=>x+7=14
=>x=7
15: =>4(x-2)=80
=>x-2=20
=>x=22
16: =>x+14=15
=>x=1
17: =>3(5-x)=3
=>5-x=1
=>x=4
18: 15:x=5
=>x=15/5=3
19: x/4=3
=>x=3*4=12
20: 21/x=7
=>x=21/7=3
Đúng 0
Bình luận (0)
