(158+154)x32-284x35
=312x32-284x35
=9984-9940
=44
(873-586)x32+(314+289)
=287x32+603
=9184+603
=9787
bai2
65+x+95784=101569
65+x =101569-95784
65+x =5785
x =5785+65
x =5850
87:x+93:x-66:x=38(minh ko biet lam)
x:2+x4=(minh ko biet lam)
(x:42)+457=625
(x:42) =625-457
(x:42) =168
x =168:42
x =4