SOLUTION: the problem is: {{{ c/2-80b=120 }}} and {{{ a/5+2b/7=1}}} (find c in terms of a) when i did the second expression, i got 80b=280-56a then i substituted this into the first

Question 62850: the problem is:
and
(find c in terms of a)
when i did the second expression, i got 80b=280-56a
then i substituted this into the first and got
c=800-112a as my final answer
is this right??
thanks
Answer by Earlsdon(6294) (Show Source): You can put this solution on YOUR website!
Well, it looks like you got it all right!..

Substituting this into the first "equation".

Simplifying, you get:

Multiplying by 2:

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