+73 Given that5a−7b+3c=19,2a−4b+c=77,determine the value of a+b+c.
Hellp me, dont give me all of the answer, just give me a nudge.
+9675 Let's call the first equation (1) and the second equation (2).
Now, consider (1) - 2*(2) and you are done.
+2864 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 = ?
