5X+2.8=6.55X=6.5-2.8=3.7X=3.7/5X=0.74
5x+2.8=6.5 5x=3.7 x=0.74
解:5x+2.8=6.5 5x=6.5-2.8 x=3.7÷5 x=0.74
x=0.75
