I’m sorry I don’t know the answer but ima tell you Photomath will be able to solve it, it. Can probably help you :))))
First you do absolute valve which will make it x+1+5=8 then you move x to one side so -x on both sides and -8 on both sides -8+1+5=-x
Then it would be -2=-x and sense you can’t have -x you would have to divide both sides by -1 your answer would be 2=x
The answer will be No, it is not a valid inference because his classmates do not make up a random sample of the students in the school. Hope it help!
B
Hope this helps
Good luck
