方程组4分之x+3分之y=3分之4 3(x减1)=4(y+2)

2024-11-16 01:30:55
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回答(1):

解:x/4 + y/3 =4/3......... (1)
3 * ( x - 1)=4 *(y+2)............(2)
(1)式两边同乘 12 得: 3x +4y =16.......(3)
(2)式化简得 : 3x - 4y = -5........(4)
(3) + (4) 得:6x =11 , x=11/6
故:y=11/8