[SOLVED] In a bag, there are red and blue cubes in the ratio 4:7. Sam adds 10 more red cubes to the bag. Now there are red and blue cubes in the ratio 6:7. How many blue cubes are in the bag?

x - redy - blue[tex]\frac{x}{y}=\frac{4}{7}\\
\frac{x+10}{y}=\frac{6}{7}\\\\
7x=4y\\
7x+70=6y\\
4y+70=6y\\
2y=70\\
y=35\\\\
7x=4\cdot35\\
7x=140\\
x=20[/tex]

In a bag, there are red and blue cubes in the ratio 4:7.
Sam adds 10 more red cubes to the bag.
Now there are red and blue cubes in the ratio 6:7.
How many blue cubes are in the bag?

Accepted Answer

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