Answer:
The unknown number here is 5.75.
Explanation:
Given,
The sum of 6 and 4 times a number is 29.
We need to find the number.
i.e.,
[tex]6+4\times(x)=29\\\\ 4x=29-6\\\\4x=23\\\\x=\frac{23}{4}\\\\x=5.75[/tex]
Thus, the number is 5.75.
The addition of 6 and four times of 5.75 will leads to 29.
Therefore, the unknown number will be 5.75.