Ответ:
9/(x+2)+14(x-2)=24/x
9/(x+2)+14(x-2)=24/x9x²-18x+14x²+28x²=24x²-96
9/(x+2)+14(x-2)=24/x9x²-18x+14x²+28x²=24x²-9624x²-23x²-28x+18x-96=0
9/(x+2)+14(x-2)=24/x9x²-18x+14x²+28x²=24x²-9624x²-23x²-28x+18x-96=0x²-10x-96=0
9/(x+2)+14(x-2)=24/x9x²-18x+14x²+28x²=24x²-9624x²-23x²-28x+18x-96=0x²-10x-96=0D=b²-4ac=(-10)²-4×1×(-96)= 100+384=484
9/(x+2)+14(x-2)=24/x9x²-18x+14x²+28x²=24x²-9624x²-23x²-28x+18x-96=0x²-10x-96=0D=b²-4ac=(-10)²-4×1×(-96)= 100+384=484√484=22
9/(x+2)+14(x-2)=24/x9x²-18x+14x²+28x²=24x²-9624x²-23x²-28x+18x-96=0x²-10x-96=0D=b²-4ac=(-10)²-4×1×(-96)= 100+384=484√484=22x=(10+22)/2=16 км/год