Question

A bag contains blue marbles and red marbles, 81 in total. The number of blue marbles is 3 more than 5 times the number of red marbles. How many blue marbles are there?

Answer 1

X : red marble

Y: blue marble

X+Y= 81 (•)

Y= 5X+3 (••)

>>> 6X+3= 81 >>>> x=13 and y = 68