How do you use cross multiplication to solve #\frac{2}{x+3}-\frac{1}{x+4}=0#?

Question

1995 views around the world

You can reuse this answer
Creative Commons License

Answer 1 · 2014-11-04T16:06:55

#2/{x+3}-1/{x+4}=0#

by adding #1/{x+4}#,

#=> 2/{x+3}=1/{x+4}#

by cross multiplication,

#=> 2cdot(x+4)=1cdot(x+3)#

by multiplying out,

#=> 2x+8=x+3#

by subtracting #x#,

#=>x+8=3#

by subtracting #8#,

#=> x=-5#

I hope that this was helpful.