連立方程式L1-代入法3(6問)
x=-6y-7 3x+8y=-6
解答○ ×答: x=2 y=-32
y=3x-9 9x+2y=7
解答○ ×答: x=53 y=-4
3x+10y=6 x=-2y+1
解答○ ×答: x=-12 y=34
2x-5y=-9 y=-2x-1
解答○ ×答: x=-76 y=43
x=3y+4 8x-6y=17
解答○ ×答: x=32 y=-56
3x-5y=42 y=-5x-28
解答○ ×答: x=-72 y=-212
問題と解答
x=-6y-7 3x+8y=-6 答: x=2, y=-32 y=3x-9 9x+2y=7 答: x=53, y=-4 3x+10y=6 x=-2y+1 答: x=-12, y=34 2x-5y=-9 y=-2x-1 答: x=-76, y=43 x=3y+4 8x-6y=17 答: x=32, y=-56 3x-5y=42 y=-5x-28 答: x=-72, y=-212
