2. Tìm x

\(a)\,\,x \times 405 = 86265\)                      \(b)\,\,89658:x = 293\)

Lời Giải:

2.

\(\eqalign{
& a)\,\,x \times 405 = 86265 \cr
& \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,x = 86265:405 \cr
& \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,x = 213 \cr
& b)\,\,89658:x = 293 \cr
& \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,x = 89658:293 \cr
& \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,x = 306 \cr} \)