Question

.Ifz/(z + 15) = 4/9 , then the value of 'z'​

Answer 1

Step-by-step explanation:

(z+15)=4/9

z+15=4/9

z=9/4 -15

z=9-15/4

z= 11

Answer 2

${ \sf {\underline {\large{Question}}}}$

If z/(z + 15) = 4/9 , then the value of ''z

$\sf{ \underline{ \large{To \: find}}}$

• value of z

$\sf{ \underline{ \large{concept \: used}}}$

✿ Here the concept of Linear equations in One Variable is used. First we will cross multiply and then solve it further by subtracting and dividing to find the value of z.

$\sf{ \underline{ \large{solution}}}$

$\sf{ \implies\frac{z}{z + 15} = \frac{4}{9}}\\ \\ {\sf{ \underline \color{purpe}{ cross \: multiply}}} \\ \\ \sf{ \implies \:9z = 4z + 15 \times 4 } \\ \\ \sf{ \implies \: 9z - 4z = 15 \times 4} \\ \\ \sf{ \implies \:5z = 15 \times 4 } \\ \\ \sf{ \implies \:z = \frac{15 \times 4}{5} } \\ \\ \sf \implies{z = 12}$

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