7/8-2x=1/6 2x=7/8-1/62x=17/24x=17/485/9÷25%x=5/1225%x=5/9÷5/120.25x=4/3x=16/3x+1/3=5/6x=5/6-1/3x=1/22.16-0.7x=0.06 0.7x=2.16-0.060.7x=2.1x=31/13×3/4+1/2×5/13+1/4×7/13=1/13×1/4×（3+10+7）=1/13×...