SOLUTION: evaluate -2a+6b when a = 6 and b =-3

Question 153920: evaluate -2a+6b when a = 6 and b =-3
Found 2 solutions by checkley77, Edwin McCravy:
Answer by checkley77(12844) (Show Source): You can put this solution on YOUR website!
-2a+6b when a = 6 and b =-3
-2*6+6*-3
-12-18=-30
Answer by Edwin McCravy(20059) (Show Source): You can put this solution on YOUR website!
Edwin's solution:
evaluate when and




Replace the  by 
Replace the  by 



Multiply  by  and get .
So we replace the  by 



Multiply  by  and get .
So we replace the  by 



Use the rule for adding two signed numbers with
like signs:



Edwin

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