①3.85÷7+4.5
②3.5÷2.5÷4
③52÷6.5+26×0.37
④(21.6+5.12)÷0.8
⑤8.5×1.9-8.5×0.9
⑥96÷[(15.4-12.2)×0.5]
4(6x+3)=60
2x+23×4=134
(3x-4)×5=4
2x+1.5x=17.5
8x-3x=105
3x+x+6=26