SOLUTION: how do you cross multiply when there is a variable in the equation

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Question 62349This question is from textbook
: how do you cross multiply when there is a variable in the equation This question is from textbook

Answer by checkley71(8403) About Me  (Show Source):
You can put this solution on YOUR website!
2/3=X/9
3X=18
X=18/3
X=6
PROOF
2/3=6/9
18=18