8/x = 2/5 what is x

can you explain how to break it down so I can learn how to solve these please.
in Algebra 1 Answers by Level 1 User (120 points)

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2 Answers

the best thing about proportion: the cross products are equal

8 * 5=2 * x

40=2x

x=20

check:

8/20=2/5
by Level 8 User (35.3k points)
by Level 1 User (380 points)

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