連立方程式L1-加減法4(8問)
x+4y=7 3x-10y=-12
解答○ ×答: x=1 y=32
9x+y=2 15x+2y=3
解答○ ×答: x=13 y=-1
x-12y=-11 3x+16y=6
解答○ ×答: x=-2 y=34
5x-y=-3 11x+3y=-4
解答○ ×答: x=-12 y=12
3x-12y=5 6x+9y=-1
解答○ ×答: x=13 y=-13
2x-12y=-5 4x+20y=23
解答○ ×答: x=2 y=34
-7x+15y=-4 x-10y=-1
解答○ ×答: x=1 y=15
-6x+5y=20 3x-4y=-13
解答○ ×答: x=-53 y=2
問題と解答
x+4y=7 3x-10y=-12 答: x=1, y=32 9x+y=2 15x+2y=3 答: x=13, y=-1 x-12y=-11 3x+16y=6 答: x=-2, y=34 5x-y=-3 11x+3y=-4 答: x=-12, y=12 3x-12y=5 6x+9y=-1 答: x=13, y=-13 2x-12y=-5 4x+20y=23 答: x=2, y=34 -7x+15y=-4 x-10y=-1 答: x=1, y=15 -6x+5y=20 3x-4y=-13 答: x=-53, y=2
