Nội dung bài giảng
Tìm x:
\(8,75 \times x + 1,25 \times x = 20\)
Bài giải:
\(\eqalign{
& 8,75 \times x + 1,25 \times x = 20 \cr
& \left( {8,75 + 1,25} \right) \times x\,\,\,\, = 20 \cr
& \,\,\,\,\,\,\,10 \times x\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\, = 20 \cr
& \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,x\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\, = 20:10 \cr
& \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,x\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\, = \,\,\,\,\,2 \cr} \)