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Fill in the blank: 3*___ = 81*5

 Dec 2, 2023
 #1
avatar+127 
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\(\textbf{Fill in the blank: 3*___ = 81*5}\)

 

Let us fill in the blank with a variable, namely \(x\).

\(3\times{x}=81\times5\)

 

Simplify to:

\(3x=405\)

\(\boxed{\textbf{x=135.}}\)

 Dec 3, 2023
edited by BlackjackEd  Dec 3, 2023
 #2
avatar+6 
0

Wondeful thinking BlackjackEd!

 

However, there is an alternative method:

 

3X=81 x 5

 

We could first divide both sides by 3 and get

 

X=27 x 5

 

This also gives us 135.

 Dec 3, 2023

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