9.5x-3x=40解:(9.5-3 )x=40 6.5x=40 x=80/13
9.5X-3X=40解: 6.5X=40 X=80/13
解:6.5x=406.5x÷6.5=40÷6.5x=13分之80
9.5x-3x=406.5x=40x=40÷65x=80/13