Question

已知方程组｛x+3y=4 x-y=8-4m｝,当m （ ）时,方程组有正整数解?正整数解为?

Answer 1

x+3y=4

x-y=8-4m

4y=4-8+4m=4m-4

y=m-1>0

m>1

x=4-3(m-1)=7-3m>0

m