解方程y⼀3-(x+1)⼀6=3,2(x-y⼀2)=3(x+y⼀18)

希望步骤详细.....thx.....................
2024-11-16 14:25:10
推荐回答(4个)
回答(1):

(1)化简得
y=1/2*x+19/2 (3)
用(3)式亮族把(2)式埋羡的y替换
2(x-(1/4*x+19/敬液弊4))=3(x+1/36*x+19/36)
化简
24x-6x-114=36x+x+19
-19x=133
x=-7 (4)
(4)代入(3)
y=1/2*(-7)+19/2=6

回答(2):

y/3-(x+1)/6=3 (1)
2(x-y/2)=3(x+y/18) (2)

(1)化简得
y=1/拿租2*x+19/2 (3)
用(3)式把(2)式的y替换
2(x-(1/消卜兆4*x+19/4))=3(x+1/36*x+19/弊仔36)
化简
24x-6x-114=36x+x+19
-19x=133
x=-7 (4)
(4)代入(3)
y=1/2*(-7)+19/2=6

回答(3):

y/3-(x+1)/6=3
2(x-y/2)=3(x+y/谨嫌18)
得陪盯:2y-(x+1)=18
6(x-y)=x+y
得:2y-x=19
5x=7y
x=133/芦晌和3
y=95/3

回答(4):

x=-7,y=6