x-0.25x=2.8+0.2
0.75x=3
x=3÷0.75
x=4其他三道？1.26-2x=0.74 2x=1.26-0.742x=0.52x=0.52÷2x=0.261.3x+1.5x=0.142.8x=0.14x=0.14÷2.8x= 0.05x÷8=0.06x=0.06×8x=0.48