解方程组{920=x+y,20x+30y=920,求x,y的值
问题描述:
解方程组{920=x+y,20x+30y=920,求x,y的值
答
x=2668 y=-1748{710+210=x+y,20x+30y=210x=2729y=-1819
解方程组{920=x+y,20x+30y=920,求x,y的值
x=2668 y=-1748{710+210=x+y,20x+30y=210x=2729y=-1819