How do you solve for x?

Algebra
Tutor: None Selected Time limit: 1 Day

1/x-9/7=-20/21

Oct 20th, 2015

Thank you for the opportunity to help you with your question!

1/x-9/7=-20/21

1/x=-20/21 +  9/7

=(-20-27)/21

=7/21

=1/3

1/x = 1/3

x=3

Please let me know if you need any clarification. I'm always happy to answer your questions.
Oct 20th, 2015

I understand everything up to the last step, how did  you get rid of the 1 in the 1/x to make x=3?

Oct 20th, 2015

You do a cross multiplication.

x * 1 =3*1

x=3

Oct 20th, 2015

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Oct 20th, 2015
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Oct 20th, 2015
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