matthew has 25 red and blue marbles he has 7 less blue than red ones how many of each color marble does he have?

Question

matthew has 25 red and blue marbles he has 7 less blue than red ones how many of each color marble does he have?

 

system of equations

Answer 1

R + B = 25

 

R - 7 = B

 

Now just substitute the second equation into the first.

 

R + (R - 7) = 25

2R - 7 = 25

2R = 32

R = 16

 

Therefore, B = 25 - 16 = 9

 

Hope this helps Susan!