2/3x=5/12 5/8除x=5/32 4/15x=20 1/2x+8/9=17/18 24-1/7x=3 2/3x-

2/3x=5/12 x=5/12÷2/3x=5/12×3/2x=5/85/8÷x=5/32 x=5/8÷5/32x=5/8×32/5x=44/15x=20 x=20÷4/15x=20×15/4x=751/2x+8/9=17/18 1/2x=17/18-8/91/2x=1/18x=1/924-1/7x=3 1/7x=21x=1472/3x-3/4=7/20 2/3x=11/10x=11/10÷2/3x=33/20x=1。653/4÷（3/4）=3/4+（1/4）=2/3×（3/2）=1