If f(x)=2x-7 and g(x)=x^+1 findf(-3)

In the equations, a and b represent the price per night for a room in hotel a and hotel b, respectively, w weeks after september 1 last autumn. what was the price per night in hotel a when it was equal to the price per night in hotel b? a = 240 − 20w b = 320 − 30w

Can someone me with this problem . show your work .

How do you use the elimination method for this question? explain, because i really want to understand!