Plz help due in 30mins

1-for what value of x is line a parallel to line b 2-for what value of x is line a parallel to line b

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?

I’m really confused and need your assist me with this question i’ve never been taught