解方程组(3x+2y)/4=x+3/4y=3(x-2)+y
问题描述:
解方程组(3x+2y)/4=x+3/4y=3(x-2)+y
答
(3x+2y)/4=x+(3/4)y=3(x-2)+y,
化简得{x=-y,
{2x+y/4=6.
解得x=24/7,y=-24/7.方程列出来给我,我看不懂(3x+2y)/4=x+(3/4)y,①x+(3/4)y=3(x-2)+y.②由①,3x+2y=4x+3y,y=-x,由②,2x+y/4=6.解得x=24/7,y=-24/7.