連立方程式L1-加減法5(8問)
2x+3y=11 3x-4y=-9
解答○ ×答: x=1 y=3
3x-5y=8 4x+7y=-3
解答○ ×答: x=1 y=-1
4x-5y=-23 6x+11y=21
解答○ ×答: x=-2 y=3
6x-5y=-26 9x+4y=7
解答○ ×答: x=-1 y=4
15x-8y=46 6x+7y=-2
解答○ ×答: x=2 y=-2
7x-2y=8 4x-3y=-1
解答○ ×答: x=2 y=3
-7x+6y=-1 5x-8y=-3
解答○ ×答: x=1 y=1
-5x-6y=13 -3x+4y=23
解答○ ×答: x=-5 y=2
問題と解答
2x+3y=11 3x-4y=-9 答: x=1, y=3 3x-5y=8 4x+7y=-3 答: x=1, y=-1 4x-5y=-23 6x+11y=21 答: x=-2, y=3 6x-5y=-26 9x+4y=7 答: x=-1, y=4 15x-8y=46 6x+7y=-2 答: x=2, y=-2 7x-2y=8 4x-3y=-1 答: x=2, y=3 -7x+6y=-1 5x-8y=-3 答: x=1, y=1 -5x-6y=13 -3x+4y=23 答: x=-5, y=2
