Name: SAT Math Help & School Math Mastery
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#12040

linear equations

money

systems

easy

45 sec

A box contains red and blue marbles. Let $r$ be the number of red marbles and $b$ be the number of blue marbles. The number of red marbles is 5 times the number of blue marbles, and the total number of marbles in the box is 60. Which system of equations represents this situation?

A.

$b = 5 r$ and $r + b = 60$

B.

$r = 5 b$ and $r + b = 60$

C.

$r = 60 b$ and $r + b = 5$

D.

$b = 60 r$ and $r + b = 5$