8x-7*[3-x]=[2x-4]*5+4
问题描述:
8x-7*[3-x]=[2x-4]*5+4
答
8x-7*[3-x]=[2x-4]*5+4
8x-21+7x=10x-20+4
15x-21=10x-16
18x-10x=21-16
8x=5
x=5/8