連立方程式L1-加減法2(8問)
x+3y=4 x-12y=-6
解答○ ×答: x=2 y=23
4x+y=1 8x+y=3
解答○ ×答: x=12 y=-1
x-6y=3 -x+10y=-4
解答○ ×答: x=32 y=-14
5x-7y=17 11x+7y=15
解答○ ×答: x=2 y=-1
8x-y=-8 8x+5y=4
解答○ ×答: x=-34 y=2
-3x+2y=9 5x+2y=-7
解答○ ×答: x=-2 y=32
-5x+y=4 5x-2y=-13
解答○ ×答: x=1 y=9
-6x+5y=10 3x-5y=-6
解答○ ×答: x=-43 y=25
問題と解答
x+3y=4 x-12y=-6 答: x=2, y=23 4x+y=1 8x+y=3 答: x=12, y=-1 x-6y=3 -x+10y=-4 答: x=32, y=-14 5x-7y=17 11x+7y=15 答: x=2, y=-1 8x-y=-8 8x+5y=4 答: x=-34, y=2 -3x+2y=9 5x+2y=-7 答: x=-2, y=32 -5x+y=4 5x-2y=-13 答: x=1, y=9 -6x+5y=10 3x-5y=-6 答: x=-43, y=25
