What does g=?

Question

r*b=72

b*g=36

r*g=32 

g=?

 

Answer 1

In evaluating the equations, I notice that rb=72 is

twice of bg=36, so I set it up as

rb = 2bg (dividing both sides by 2b, the result is)

g = r/2 use this to substitute r*g=32 would look like:

r * r/2 = 32 (multiply)

r²/2 = 32 (multiply 2 to rid of fraction)

r² = 64 (take square root)

r = 8

Now, substitute r=8 in r*b =72 and b=9.

Substitute b in b*g = 36; g = 4.

 

Go Get Your "A"