5x-= 15:x=:0.6
①0.96×÷ ②÷4+4÷ ③2019×
④×13+×25 ⑤(+2.1)×÷0.9 ⑥0.5+÷(0.75+)
5%x=0.27 20%x-2.3=4.7
3x+90%×4=9.6 x-20%x=2.8
6×(0.1x-2)=1.8 (28-x)×9=5