Answer:
x+(x+650)=865
Step-by-step explanation:
so we have two cars. call one car x and the other y. from this we know x+y= 856. so, the equation for the cost of the two cars together is x + y = 865. but we can only use x as a variable, so what i ls x equal to? we also know that y-x=650. so, y=650+x. plug this into the first question, ans we have the equation for the cost of both together.