6x=24
x=24÷6
x=4
4.5x=90
x=90÷4.5
x=20
0.8x=9.6
x=9.6÷0.8
x=12
x÷3=12
x=12*3
x=36
y÷2.8=11
y=11*2.8
y=30.8再帮忙一道就选你：y÷0.7=2.2y÷0.7=2.2y=2.2*0.7y=1.54三克油！！客气，明白请采纳，有疑问请追问！