連立方程式L1-代入法5(6問)
x=-5y-2 3x+10y=-3
解答○ ×答: x=1 y=-35
y=-2x-17 7x+12y=0
解答○ ×答: x=-12 y=7
-4x+6y=19 4x=3y-11
解答○ ×答: x=-34 y=83
2x-3y=25 y=-2x+1
解答○ ×答: x=72 y=-6
x=-2y-57 4x-3y=-30
解答○ ×答: x=-21 y=-18
24x-2y=3 2y=-12x+1
解答○ ×答: x=19 y=-16
問題と解答
x=-5y-2 3x+10y=-3 答: x=1, y=-35 y=-2x-17 7x+12y=0 答: x=-12, y=7 -4x+6y=19 4x=3y-11 答: x=-34, y=83 2x-3y=25 y=-2x+1 答: x=72, y=-6 x=-2y-57 4x-3y=-30 答: x=-21, y=-18 24x-2y=3 2y=-12x+1 答: x=19, y=-16
