Solve the following equations.
$ \frac{z}{z+15}=\frac{4}{9} $.

AcademicMathematicsNCERTClass 8

Given:

\( \frac{z}{z+15}=\frac{4}{9} \)

To do: 

We have to solve the given equation.

Solution:

$\frac{z}{z+15}=\frac{4}{9}$

$\Rightarrow 9(z)=4 \times(z+15)$                [On cross multiplication]

$\Rightarrow 9z=4z+60$

$\Rightarrow 9z-4z=60$

$\Rightarrow 5z=60$

$\Rightarrow z=\frac{60}{5}$

$\Rightarrow z=12$

The value of $z$ is $12$.

raja
Updated on 10-Oct-2022 13:47:38

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