Question

Tim x 

2/5 cong x = 8/7                                                                                            x - 2/5 = 8/7

lam tung buoc ra nha thank you 

ai nhanh nhat minh TICK cho

Answer 1

2/5+x= 8/7

   => x= 8/7 - 2/5 = 26/35

x-2/5 = 8/7

=> x= 8/7+2/5 = 54/35

duyệt đi

Answer 2

2/5+x=8/7

x=8/7-2/5

x=40/35-14/35

x=(40-14)/35

x=26/35

x-2/5=8/7

x=8/7+2/5

x=40/35+14/35

x=(40+14)/35

x=54/35

x=1/19/35

nho K cho mih do nha, chu dung co choi cai kieu goi la An Chao Da Bat day nhe

Answer 3

2/5 + x = 8/7 => x = 8/7 - 2/5 = 40/35 - 14/35 = 26/35

x - 2/5 = 8/7 => x = 8/7 + 2/5 = 40/35 + 14/35 = 54/35

Answer 4

2/5+x=8/7 

x=8/7 -2/5

x=40/35-14/35

x=26/35