+73 \(Given\ that\\ \begin{align*} 5a - 7b + 3c &= 19, \\ 2a - 4b + c &= 77,\end{align*}\\ determine\ the\ value\ of\ a+b+c.\)
Hellp me, dont give me all of the answer, just give me a nudge.
+9673 Let's call the first equation (1) and the second equation (2).
Now, consider (1) - 2*(2) and you are done.
+2863 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 = ?
