1.6X+2X=93.6X=9X=2.5
1.6X+2X=9,用方程怎么解3.6x=9x=90÷36x=10/4x=5/2
1.6×2x=9解: 3.2x=93.2x÷3.2=9÷3.2x=2.8125
方程式应该是:1.6X+2X=9 解3.6X=9 X=2.5