49p/1(1)15.500x+300y(2)x=7,y=8/2(1)x+y=13,400x+250y(2)x=5,y=8/3(1)2(x+y),x,y(2)x=9,y=5/4(1)x+y=46,x+16(2)x=36,y=10/5(1)4(x+y),10x+y+27(2)x=3,y=6입니다
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