Question

1.             Tìm x:

X :  4,28 = 9,5               102,66 + x = 80,8

X – 38,85 = 50,21         79,27 – x =  38,08

Answer 1

\(a,x:4,28=9,5\\ =>x=9,5\times4,28\\ =>x=40,66\\ b,102,66+x=80,8\\ =>x=80,8-102,66\\ =>x=-21,86\\ c,x-38,85=50,21\\ =>x=50,21+38,85\\ =>x=89,06\\ d,79,27-x=38,08\\ =>x=79,27-38,08\\ =>x=41,19\)