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What is the value of x + y + z when 6x + 5y - 2z = -4 and 4x + 5y + 12z = 54?

 

i tried combining  and getting rid of y but it didnt work. help anyone?

 Nov 28, 2022
 #2
avatar+285 
+1

Hmm don't overthink it too much

just add the equations up! You will notice something

 Nov 28, 2022

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