5:x =2:8 3x÷2= 12
1.26﹣2x=0.74 :x=:
x∶(1-40%)=24∶3
⑴4.5x + x= 11 ⑵ = ⑶ :8 = x :
60%x+14=32.6
5(x-2.8)=140
1.2x-5.5=0.5 :x=3:16 9x+42=150
① ②
①1.5x-2.8=4.7
②
③12: =
①
③ =3:2