emath3311 emath3311

13-05-2017
Mathematics

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There are 27 red or blue marbles in a bag. The number of red marble is 5 less than 3 times the number of blue marbles. How many red marbles are in the bag? How many blue marbles are in the bag

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amandabmartin amandabmartin

13-05-2017

x = red, y = blue

x = 3y - 5
x + y = 27

x - 3y = -5
x + y = 27

-4y = -32
y = 8

x = 19

8 blue marbles

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