your answer is $60. how i got this by taking 3 and multiplyed it by $20 and that gave me $60. so we know 60 + 50=110 so it's the same as $60 + $50=$110.
also you could put it in a equation which is $50 + $3(x)=$110.
to solve that you would just find out what can fit in the X place which was $20.
=>so this is your answer, $20.00. <=
