Help me please

Afruit stand has to decide what to charge for their produce. they need $10 for 4 apples and 4 oranges. they also need $15 for 6 apples and 6 oranges. we put this information into a system of linear equations. can we find a unique price for an apple and an orange?

Find the solution of this system of equation -7x+y=-20 9x-3y=36

Ineed me i stuck and i don’t want to get it wrong