The sum of three numbers is 23. The first number is 7 less than twice the second number. The third number is one greater than the sum of the first and second numbers.

6

Step-by-step explanation:

We know the second number has to more than four, otherwise we can't subtract 7. But, if you calculate, 8 would be far too big. A number in between 4-8, 6.

The double of 6 is 12. 12-7=5.

This is showing the first number would be 5 and the second 6.

The third is one more than their sum. 5+6=11+1=12.

So finally adding, 11+12=23.

answer: c

because if you look at the chart you can see a pattern and compare it to the question he simplify out your

but i think the formula is f(x)=6x