χ×2/3=75 χ×4/15=8 7χ÷1/2=3/5 9/8÷χ=1/4
χ×5/8=1/12 χ×8=4/5 χ×5/4=5/8 χ×3/5=45
χ×2/3=75 χ×4/15=8 7χ÷1/2=3/5 9/8÷χ=1/4
χ×5/8=1/12 χ×8=4/5 χ×5/4=5/8 χ×3/5=45
χ×5/8=1/12 χ×8=4/5 χ×5/4=5/8 χ×3/5=45
χ×2/3=75 χ×4/15=8 7χ÷1/2=3/5 9/8÷χ=1/4
χ×5/8=1/12 χ×8=4/5 χ×5/4=5/8 χ×3/5=45
χ×2/3=75 χ×4/15=8 7χ÷1/2=3/5 9/8÷χ=1/4
1/7+x=9/14 4/9+x=1 x-3/4=5/6 x+1/6=4/3
3/4+x=7/8 x-(1/2+1/3)=1/6 x-1/3+2/3=2 x-2=5/6
x+4/5=1 x-1/4=1/3
↑这个也是