Mathematics
Junior High
Resolved

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教 p.46 問1 1 次の連立方程式を解きなさい。 [2.x+5y = 12 12(r+3)+y= 10 J2.x-3y =-9 13(r+2y)-y=-4 [4.c+3y =5 y=3(r+1)-10

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