x-5/8x=15 (1-5/8)x=15(3/8)x=15x=15÷(3/8)x=402/5x-3/10x=120 (2/5-3/10)x=120(1/10)x=120x=120÷(1/10)x=12005+1/3x=13 1/3x=13-5=8x=8÷(1/3)x=242/3x=2/9 x=(2/9)÷(2/3)x=1/3x除5/8=1/12 x=(1/12)×(5/8)x=5/9...