math help needed
posted by alisha .
the question is:
3x2z7
if x=3 and z= 1
i did the the question and got the answer  14 ....but the answer key that i got say 20....can anyone help me... with this plz....

math help needed 
Damon
3(3) 2(1)  7
9 +2 7
7  7
14
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