連立方程式L1-代入法4(6問)
3x=-5y+6 3x+2y=15
解答○ ×答: x=7 y=-3
2y=3x+7 5x+2y=-33
解答○ ×答: x=-5 y=-4
-4x+5y=48 4x=3y-32
解答○ ×答: x=-2 y=8
6x-5y=72 5y=-2x-16
解答○ ×答: x=7 y=-6
8x=3y-9 8x-5y=1
解答○ ×答: x=-3 y=-5
3x-7y=-15 7y=5x-3
解答○ ×答: x=9 y=6
問題と解答
3x=-5y+6 3x+2y=15 答: x=7, y=-3 2y=3x+7 5x+2y=-33 答: x=-5, y=-4 -4x+5y=48 4x=3y-32 答: x=-2, y=8 6x-5y=72 5y=-2x-16 答: x=7, y=-6 8x=3y-9 8x-5y=1 答: x=-3, y=-5 3x-7y=-15 7y=5x-3 答: x=9, y=6
