Question

4/9 *y+5/9*y=4

Answer 1

\(y\cdot\dfrac{4}{9}+y\cdot\dfrac{5}{9}=4\)

=>\(y\left(\dfrac{4}{9}+\dfrac{5}{9}\right)=4\)

=>\(y\cdot1=4\)

=>y=4

Answer 2

\(\dfrac{4}{9}xy+\dfrac{5}{9}xy=4\)

\(yx\left(\dfrac{4}{9}+\dfrac{5}{9}\right)=4\)

\(yx1=4\)

\(y=4:1\)

\(y=4\)