解方程y/3-(x+1)/6=3,2(x-y/2)=3(x+y/18)
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解方程y/3-(x+1)/6=3,2(x-y/2)=3(x+y/18)
thx.
thx.
(1)化简得
y=1/2*x+19/2 (3)
用(3)式把(2)式的y替换
2(x-(1/4*x+19/4))=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
y=1/2*x+19/2 (3)
用(3)式把(2)式的y替换
2(x-(1/4*x+19/4))=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
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