320×5/8-x=320-x×3/5
200-x=320-0.6x
0.4x=-120
x=-300
320*8分之5-x=320-x*5分之3
200-x=320-5分之3x
-120=5分之2x
-600=2x
-300=x
320×5/8-x=320-3/5x
解:320×5/8-x+x=320-3/5x+x
2 0= 320+2/5x
2/5x=320-20
2/5x=300
x=300÷2/5
x=300×5/2
x=750
320x5/8-x=320-3/5x
200-x=320-3/5x
3/5x-x=320-200
-2/5x=120
x=-300
320*5/8-x=320-3/5X
-320*3/8=2/5x
-120=2/5x
x=-300