数学方程1/7中括号1/5（x+2/3+4）+6中括号括回+8=9

1/7[1/5(x+2/3+4)+6]+8=9
1/7[1/5(x+2/3+4)+6]=1
1/5(x+2/3+4)+6=7
1/5(x+2/3+4)=1
x+2/3+4=5
x+2/3=1
x=1/3
1/5[1/4(1/2x+1)-3/4]=0
1/4(1/2x+1)-3/4=0
1/4(1/2x+1)=3/4
1/2x+1=3
1/2x=2
x=4
3/2[2/3(x/4-1)-2]-x=2
(x/4-1)-3-x=2
x/4-4-x=2
-3/4x=6
x=6*4/(-3)
x=-8