What is x? 5a 4a 90 O 9 O 100 80

asked May 6, 2023 12.3k views

1 vote

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1 vote

In this case, we can wee that

$5a+4a=\text{ 180}$

hence,

$\begin{gathered} 9a=180 \\ a=(180)/(9) \\ a=20 \end{gathered}$

On the other hand, we can also see that

since a=20, then

$\begin{gathered} x+4(20)=180 \\ x+80=180 \\ x=180-80 \\ x=100 \end{gathered}$

Eugenio answered May 11, 2023

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