Systems of inequalities word problems graphing

Giving ad is congruent to bc and angle bcd is congruent to angle adc prove d e is going to ce

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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?