Question

How do you cross multiply `\frac{4x}{x+2}=\frac{5}{9}`?

Answer 1

In cross-multiplication, we multiply the numerator of each (or one) side by the denominator of the other side. This could be represented as:

So, in this case,

`(4x)/(x+2)=5/9`

By cross multiplication,

`9*(4x)=5*(x+2)`

`36x=5x + 5*(2)`

`36x-5x=10`

`31x=5`

`x=5/31`