SOLUTION: Solve each system by addition: 4x+3= -3y -x/7 + 4y/21= 1 / are fractions I know the answer is (-3,3) can you show me how to do that?

Question 329182: Solve each system by addition:
4x+3= -3y
-x/7 + 4y/21= 1
/ are fractions
I know the answer is (-3,3)
can you show me how to do that?
Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
(1)
(2)
first, I will get (1) into the same form as (2)
(1)
Then I multiply both sides of (2) by
(2)
Now I multiply both sides of (1) by
(1)
Now I multiply both sides of (2) by
(2)
Now I add (1) and (2)

Then I substitute this result back into (1)
(1)

The answer is (-3,3)

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