連立A=B=C-2(8問)
2x+3y = -2x+9y = 2
解答○ ×答: x=12 y=13
4x-6y = 8x-3y = -6
解答○ ×答: x=-12 y=23
8x+3y = -4x+6y-8 = 3
解答○ ×答: x=-14 y=53
12x+3y = 52x-13y-14 = -8
解答○ ×答: x=2 y=-3
52x-14y = 43x-32y+2 = 16
解答○ ×答: x=6 y=-4
34x-23y+1 = 23x-43y-1312 = 94
解答○ ×答: x=-1 y=-3
-23x+32y+14 = -34x-23y-2512 = 112
解答○ ×答: x=-2 y=-1
14x+43y+12 = 56x-29y-163 = -3
解答○ ×答: x=2 y=-3
問題と解答
2x+3y = -2x+9y = 2答: x=12, y=13 4x-6y = 8x-3y = -6答: x=-12, y=23 8x+3y = -4x+6y-8 = 3答: x=-14, y=53 12x+3y = 52x-13y-14 = -8答: x=2, y=-3 52x-14y = 43x-32y+2 = 16答: x=6, y=-4 34x-23y+1 = 23x-43y-1312 = 94答: x=-1, y=-3 -23x+32y+14 = -34x-23y-2512 = 112答: x=-2, y=-1 14x+43y+12 = 56x-29y-163 = -3答: x=2, y=-3
