SOLUTION: 1/35 = c/70 90/a = 15/13

Algebra ->  Proportions  -> Lessons -> SOLUTION: 1/35 = c/70 90/a = 15/13       Log On


   

Question 407401: 1/35 = c/70

90/a = 15/13


Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!
# 1

1%2F35=c%2F70 Start with the given proportion


%281%2F35%29%2A70=c Multiply both sides by 70


70%2F35=c Multiply


2=c Simplify


So our answer is c=2

=====================================================
# 2

90%2Fa=15%2F13 Start with the given ratio


90=%2815%2F13%29%2Aa Multiply both sides by a


90%2A13=15%2Aa Multiply both sides by 13


1170=15%2Aa Multiply


1170%2F15=a Divide both sides by 15


78=a Simplify


So our answer is a=78


If you need more help, email me at jim_thompson5910@hotmail.com

Also, please consider visiting my website: http://www.freewebs.com/jimthompson5910/home.html and making a donation. Thank you

Jim