SOLUTION: Could someone show me how to put these problems on paper not just the answers because unless I can see how it is written it doesn't help me. The problem states,Solve for the unkno

Algebra ->  Numeric Fractions Calculators, Lesson and Practice -> SOLUTION: Could someone show me how to put these problems on paper not just the answers because unless I can see how it is written it doesn't help me. The problem states,Solve for the unkno      Log On


   



Question 181312: Could someone show me how to put these problems on paper not just the answers because unless I can see how it is written it doesn't help me.
The problem states,Solve for the unknown (x) in the following proportions:
1) 2/10 = 16/x x =
2) 7/30 = x/90 x =

Someone on this site did tell me that I need to cross multiply but I don't know how to write that on my paper and how it is suppose to look. If you could help me because I have a test soon and would really appreciate the help.
Thank you in advance

Answer by solver91311(24713) About Me  (Show Source):
You can put this solution on YOUR website!


If you have a proportion of the form:



Then you can cross-multiply, by multiplying the numerator on one side times the denominator on the other side and setting that equal to the numerator on the second side times the denominator on the first side, like this:



So for your first problem:



You should be able to take it from here.


John