Answers

2016-04-25T20:38:00+05:30

(x1+x2+x3+x4)/4=16.........1

0.5(x2+x3+x4)=23      |0.5=1/2|

x2+x3+x4=46........2

using eq2 in eq1

(x1+46)/4=16

x1+46=64

x1=64-46

    =18


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