Question

Find the unknown factor.
28=7 x (4 x

Answer 1

The missing factor is 1.

`28=7*(4*1)`

Explanation:

`28=7*(4* y)`, where y is the unknown factor.

You can solve this equation for y.

Divide both sides by 7:

`\rightarrow 28/7=(7*(4* y))/7\\\rightarrow4=4* y`

Divide both sides by 4:

`\rightarrow4/4=(4* y)/4\\\rightarrow1=y\\\rightarrow y=1`

The missing factor is 1.

`28=7*(4*1)`

You can also tell just by looking on this particular problem.
`7*4=28`, so the missing factor can't be anything other than 1.