x-2[x-3(x+3)-5]=3[2x-8(4-x0]-2 x=?

问题描述:

x-2[x-3(x+3)-5]=3[2x-8(4-x0]-2 x=?
guo cheng

x-2[x-3(x+3)-5]=3[2x-8(4-x0]-2 x-2(x-3x-9-5)=3(2x-32+8x)-2 x-2(-4x-14)=3(10x-32)-2 x+8x+28=30x-96-2 9x+28=30x-98 21x=126 x=6