A bag contains green marbles and blue marbles, 36 in total. The number of green marbles is 4 more than 3 times the number of blu
e marbles. How many green marbles are there?
1 answer:
Number of blue marbles = n
number of green marbles = 3n+4
n+3n+4=36
4n+4=36
4n=32
n=8
sub n=8 into 3n+4
=3(8)+4
=24+4
=28
therefore there are 28 green marbles
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