If two angles are supplementary and their measures are m∠1=(5x + 10) and m∠2=(x + 14). Find x and the measure for both angles.

Step-by-step explanation:

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your answer is C. Henry knows he gave the cashier $20. He does not know how much his lunch cost. He knows he got $14.50 back from the cashier. 

the equation $20-L=$14.50
the 20 is how much he gave
the L is the lunch cost 
and the 14.50 is the change he got back