解下列方程:3(x-7)-2【9-4(2-x)】=22; x-1/3【x-1/3(x-9)】=1/9(x-9).
问题描述:
解下列方程:3(x-7)-2【9-4(2-x)】=22; x-1/3【x-1/3(x-9)】=1/9(x-9).
3(x-7)-2【9-4(2-x)】=22;
x-1/3【x-1/3(x-9)】=1/9(x-9).
答
3(x-7)-2【9-4(2-x)】=223X-21-2【9-8+4X】=223X-21-2-8X=22-5X=22+23X=45/-5x=-9x-1/3【x-1/3(x-9)】=1/9(x-9).X-1/3【X-1/3X+3】=1/9X-1X-1/3【2/3X+3】-1/9X=-1X-2/9X-1/9X=1-12/3X=0X=0...