連立A=B=C-1(8問)
x+2y+4 = 5x+4y-4 = 9
解答○ ×答: x=1 y=2
2x+y+3 = 2x+4y = 0
解答○ ×答: x=-2 y=1
-x+2y = 3x-4y = -1
解答○ ×答: x=-3 y=-2
3x = 5x-3y+2 = 15
解答○ ×答: x=5 y=4
3x+2y+4 = 4x-y+14 = 7
解答○ ×答: x=-1 y=3
-4x-2y+3 = 7x+y-21 = -3
解答○ ×答: x=3 y=-3
2x+2y-1 = -3x-2y-11 = -7
解答○ ×答: x=2 y=-5
5x+4y-2 = x+3y-9 = -19
解答○ ×答: x=-1 y=-3
問題と解答
x+2y+4 = 5x+4y-4 = 9答: x=1, y=2 2x+y+3 = 2x+4y = 0答: x=-2, y=1 -x+2y = 3x-4y = -1答: x=-3, y=-2 3x = 5x-3y+2 = 15答: x=5, y=4 3x+2y+4 = 4x-y+14 = 7答: x=-1, y=3 -4x-2y+3 = 7x+y-21 = -3答: x=3, y=-3 2x+2y-1 = -3x-2y-11 = -7答: x=2, y=-5 5x+4y-2 = x+3y-9 = -19答: x=-1, y=-3
