Respuesta :

3a-13=47

   +13 +13                 (You add 13 to both sides)

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3a=60

/3    /3                     (Then, divide by 3 to both sides)

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a=20

Hey there!

Explanation:

First, you had to do is add by 13 from both sides of an equation.

[tex]3a-13+13=47+13[/tex]

Then, simplify or add by the numbers.

[tex]47+13=60[/tex]

[tex]3a=60[/tex]

Next, you can also divide by 3 from both sides of an equation.

[tex]\frac{3a}{3}=\frac{60}{3}[/tex]

And finally, simplify and divide by the numbers,

[tex]60/3=20[/tex]

*The answer must have a positive sign.*

[tex]\boxed{a=20}[/tex]

Hope this helps!

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