3(x+2/3)-(x-1)=7急
问题描述:
3(x+2/3)-(x-1)=7
急
答
解
3(x+2/3)-(x-1)=7
3x+2-x+1=7
2x=4
x=2
答
3x+2-x+1=7
2x=4
x=2