七年級(jí)上冊(cè)數(shù)學(xué)導(dǎo)學(xué)案

第六單元答案

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解：把x=0和y=2代入方程，得：2n=8
n=4
當(dāng)n=4時(shí),mx+ny=8
mx+4y=8
把x=4,y=1代入mx+4y=8
得：4m+4=8
m=1
則m=1,n=4.

m不等于1或小于0

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