Question

if the mean of data x,x+1,x+3,x+6 is 15/2, find x

Answer 1

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Answer 2

X+X+1+X+3+X+6/4=15/2
4x+10/4=15/2
4x+10=15/2*4
2(2x+5)=15*2
2x+5=15*2÷2
2x+5=15
2x=10
X=5