Question

find the common value of x​

Answer 1

If two of the three terms are equal then the common value is just the value of the two terms that are equal.

1) If 3 and x+2 are the two terms that are equal, the common value is k=3=x+1. (Which means x=1 and k=3=x+1=3.)

2) If 3 and y−4 are the two terms that are equal, the common value is k=3=y−4. (Which means y=7 and k=3=y−4=3.

3) If x+2 and y−4 are the two terms that are equal, the common value is k=x+2=y−4. (Which means the common value is 4 less than whatever y is and 2 more than whatever x).

We are also told that the third value is at most this common value.

So

1) if 3=x+2 then y−4≤3=x+2.

2) if 3=y−4 then x+2≤3=y−4.