【用戶】peter971016
【年級】小一下
【評論內容】因為成正比 (2y + 5) = k (6x - 3) ------- 算式一將x=-3, y=1代入2+5 = k(-18-3)7 = -21kk = -1/3再將k代入算式一2y+5 = -1/3(6x-3)2y+5 = -2x + 12x + 2y + 4 = 02(x+y+2) = 0x+y+2 = 0