解下列方程組(寫過程)
解下列方程組(寫過程)
{5(m-1)=2(n+3)①
{2(m+1)=3(n-3)②
{3(x=y)-4(x-y)=4①
{2/x+y+6/x-y=1②
是3(x+y)
{5(m-1)=2(n+3)①
{2(m+1)=3(n-3)②
{3(x=y)-4(x-y)=4①
{2/x+y+6/x-y=1②
是3(x+y)
數(shù)學(xué)人氣:130 ℃時(shí)間:2020-06-13 08:28:21
優(yōu)質(zhì)解答
(1)5(m-1)=2(n+3),2(m+1)=3(n-3)即5m-5=2n+6,2m+2=3n-9所以5m-2n=11 (1)2m-3n=-11 (2)(1)×3-(2)×215m-4m=33+2211m=55m=5n=(5m-11)/2=7(2)將x+y設(shè)為M 、x-y設(shè)為N3M-4N=4 12/M+6/N=1 2由1得M=(4N+4)/3 帶入2...對(duì)不起,第二個(gè)是3(x+y)我的回答中是按(x+y)來回答的
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