Question

For the data 11,15,17,x+1,19,x-2,3 if the mean is 14 find the value of x

Answer 1

Mean=11+15+17+x+1+19+x-2+3/7
14=26+34+2x-1/7
14×7=49+2x
2x=98-49
x=49/2

Answer 2

x=17
sum of all/7=14
64+2x/7=14
64+2x=98
2x=98-64
2x=34
x=17