\(Given\ that\\ \begin{align*} 5a - 7b + 3c &= 19, \\ 2a - 4b + c &= 77,\end{align*}\\ determine\ the\ value\ of\ a+b+c.\)

Hellp me, dont give me all of the answer, just give me a nudge.

CuteDramione Jun 22, 2019

#1**0 **

Let's call the first equation (1) and the second equation (2).

Now, consider (1) - 2*(2) and you are done.

MaxWong Jun 22, 2019

#2**0 **

So basically he means that you have to use elimination.

Dont actually solve for A B C just get it where you have one equation and it is a + b + c = ?

CalculatorUser Jun 22, 2019