已知甲车行驶35千米与乙车行驶45千米所用时间相同，且乙车每小时比甲车多行驶15千米，设甲车的速度为x千米/小时，依据题意列方程正确的是（）A．35x=45x-15B．35x+15=45xC．35x-

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