a) x-2/9=48/27 b) x+2/3=4/5 c) 7/9-x=1/3 d) x:2/3=9/8

2 câu trả lời

a,x-29-4827

x-29=169

x=169+29

x=189

x=2

b,x+23=45

x=45-23

x=1215-1015

x=215

c,79-x=13

x=79-13

x=79-29

x=59

d,x:23=98

x=98×23

x=34

 

a)x-29 =4827 

x=4827 +29 

x=2

b)x+23 =45 

x=45 -23 

x=215 

c)79 -x=13 

x=79 -13 

x=49 

d)x:23 =98 

x=98 .23 

x=34