解方程组:3x+2y\4=2x+y+2\5=-x+5y\3.
问题描述:
解方程组:3x+2y\4=2x+y+2\5=-x+5y\3.
答
(3X+2Y)/4=(2X+Y+2)/5 (1)(2X+Y+2)/5=-(X+5Y)/3 (2)由(1)式得15X+10Y=8X+4Y+87X+6Y=8 (3)由(2)式得6X+3Y+6=-5X-25Y11X+28Y=-6 (4)(3)*11-(4)*7Y=-1将Y=-1...