x×8= n×1= m×0.5×n=
a×3.2+3.2= 2k×0.5= y×6×y=
①x-6.75=1.68
②0.7x=4.2
③5x+20=76
④4×(0.3+x)=4.8
⑤0.7x+6×5=37
⑥(10x-25)÷5=15