algebra

\(\textbf{Fill in the blank: 3*___ = 81*5}\)

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

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

Simplify to:

\(3x=405\)

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

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.