連立A=B=C-5(8問)
x+y+2 = -x-y+8 = 2x+3y-2
解答○ ×答: x=2 y=1
2x+y+2 = x-2y+3 = 2x+3y+2
解答○ ×答: x=1 y=0
2x+3y+1 = -3x+y-4 = 4x-y+3
解答○ ×答: x=-1 y=0
2x+3y+2 = 3x-y+6 = -3x+3y+2
解答○ ×答: x=0 y=1
x-y-1 = 4x-3y-1 = 2x+y-9
解答○ ×答: x=2 y=3
3x-2y+3 = 2x-4y-4 = -x+2y+11
解答○ ×答: x=-1 y=-3
-2x+y+4 = -3x-2y-1 = x+2y+11
解答○ ×答: x=-2 y=-1
x+4y-3 = 2x+5y+1 = -3x+6y-1
解答○ ×答: x=-1 y=-3
問題と解答
x+y+2 = -x-y+8 = 2x+3y-2答: x=2, y=1 2x+y+2 = x-2y+3 = 2x+3y+2答: x=1, y=0 2x+3y+1 = -3x+y-4 = 4x-y+3答: x=-1, y=0 2x+3y+2 = 3x-y+6 = -3x+3y+2答: x=0, y=1 x-y-1 = 4x-3y-1 = 2x+y-9答: x=2, y=3 3x-2y+3 = 2x-4y-4 = -x+2y+11答: x=-1, y=-3 -2x+y+4 = -3x-2y-1 = x+2y+11答: x=-2, y=-1 x+4y-3 = 2x+5y+1 = -3x+6y-1答: x=-1, y=-3
