SOLUTION: solve these proportions. One of the examples in my text book was 65/10 = 13/x 10 x x/63+63 x 2/9 x=14 I dont get how to do any of these I get how you times the top left corn

Question 15124: solve these proportions. One of the examples in my text book was
65/10 = 13/x
10 x x/63+63 x 2/9
x=14
I dont get how to do any of these I get how you times the top left corner w/ the bottom right corner and the bottom left coner w/the upper right corner but after those steps I dont get also heres a problem im on.

3/8 + 12/x
Answer by Earlsdon(6294) (Show Source): You can put this solution on YOUR website!
You can solve proportions by cross-multiplying.
Cross-multiply. This means, multiply both sides by x then multiply both sides by 10.
Simplify.
Divide both sides by 65

I assume that there is a typo in the second problem and you really meant to type:
Try this yourself. Cross-multiply, first by x then by 8, then you can solve for x.

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