It would help if you proofread your questions before you posted them. Though not sure, I assume the numbers after the mean are the raw scores.
mean = Σx/n
20 = (6+22+7+36+x)/5
Solve for x.
mean is 20; 6,22,7,36,x what is the value of x
2 answers
20x5=100
6+22+7+36=71
100-71=29
X=29
double check
6+22+7+36+29=100
100/5=20
6+22+7+36=71
100-71=29
X=29
double check
6+22+7+36+29=100
100/5=20