①x÷1.44=0.4
②3.85+1.5x=6.1
③12x-9x=8.7
④(100-3x)÷2=8
8x=2.4 x-0.7=3.6 (x+1.3)÷5=1.2
①2x+8=16
②x÷5=10
③x+7x=8
④6x-6=0