連立方程式L1-加減法1(8問)
x+3y=7 x-2y=-3
解答○ ×答: x=1 y=2
5x+y=-11 8x+y=-17
解答○ ×答: x=-2 y=-1
x-4y=7 -x+8y=-11
解答○ ×答: x=3 y=-1
2x-y=5 4x+y=7
解答○ ×答: x=2 y=-1
2x-7y=-20 2x-15y=-36
解答○ ×答: x=-3 y=2
-8x+3y=25 10x+3y=-11
解答○ ×答: x=-2 y=3
-4x+5y=-2 4x+3y=18
解答○ ×答: x=3 y=2
6x+5y=-14 2x-5y=-18
解答○ ×答: x=-4 y=2
問題と解答
x+3y=7 x-2y=-3 答: x=1, y=2 5x+y=-11 8x+y=-17 答: x=-2, y=-1 x-4y=7 -x+8y=-11 答: x=3, y=-1 2x-y=5 4x+y=7 答: x=2, y=-1 2x-7y=-20 2x-15y=-36 答: x=-3, y=2 -8x+3y=25 10x+3y=-11 答: x=-2, y=3 -4x+5y=-2 4x+3y=18 答: x=3, y=2 6x+5y=-14 2x-5y=-18 答: x=-4, y=2
