SOLUTION: I can't seem to figure out how check to make the answer is right. 3a/7=-2/5 a=-14/15 could you help me. Thank you so much!!

Algebra ->  Expressions-with-variables -> SOLUTION: I can't seem to figure out how check to make the answer is right. 3a/7=-2/5 a=-14/15 could you help me. Thank you so much!!      Log On


   

Question 86642This question is from textbook algebra structure and method
: I can't seem to figure out how check to make the answer is right.
3a/7=-2/5
a=-14/15
could you help me. Thank you so much!! This question is from textbook algebra structure and method

Answer by tutorcecilia(2152) About Me  (Show Source):
You can put this solution on YOUR website!
Check by plugging (a=-14/15) back into the original equation and solve:
%283a%2F7%29= %28-2%2F5%29
%283%28-14%2F15%29%2F7%29 = %28-2%2F5%29
%28%28-14%2F5%29%2F%287%29%29 = %28-2%2F5%29
%28%287%2F1%29%28-14%2F5%29%2F%287%29%29= %28%287%2F1%29%28-2%2F5%29%29 [multiply each side by the reciprocal of (1/7)]
%28-14%2F15%29 = %28-14%2F15%29 [checks out]