A bag contains blue marbles and red marbles, 48 in total. The number of blue marbles is 9 more than 2 times the number of red marbles. How many blue marbles are
Mathematics
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Question
A bag contains blue marbles and red marbles, 48 in total. The number of blue marbles is 9 more than 2 times the number of red marbles. How many blue marbles are there?
2 Answer

1. User Answers wegnerkolmp2741o
Answer:
There are 35 blue marbles
Stepbystep explanation:
b = blue marbles
r = red marbles
r+b = 48
b = 2r+9
Substitute b =2r+9 into the first equation
r + (2r+9) = 48
Combine like terms
3r +9 = 48
Subtract 9 from each side
3r+99 = 489
3r = 39
Divide each side by 3
3r/3 = 39/3
r = 13
There are 13 red marbles
We need to find the blue marbles
b =2r+9
b = 2(13) +9
= 26+9
= 35
There are 35 blue marbles

2. User Answers HomeWorkStudy
Answer:
35 Blue Marbles.
Stepbystep explanation:
This is a complex problem, since the value of 2R has to be divided by 2 beforing adding the value of B, to get the total of 48.
B=35 R=13
B=9+2R.
48=9+(2R÷2) 48=9+(2(13)÷2)
48=9+26+13 48=35+13
48=48.