SOLUTION: 4x-3y=19 6x+3y=21

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Question 1016110: 4x-3y=19
6x+3y=21
Found 2 solutions by Fombitz, skippo:
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
Add the equations together to eliminate y.
4x-3y%2B6x%2B3y=19%2B21
Now solve for x.
Then go back to either equation and solve for y.

Answer by skippo(9) About Me  (Show Source):
You can put this solution on YOUR website!
4x-3y=19...........I
6x+3y=21...........II
solution:
add equation I and II to eliminate y
4x-3y+6x+3y=19+21
10x=40
divide both sides by 10
10x/10 = 40/10
x=4
substitute 4 for x in equation I
4(4)-3y=19
16-3y=19
-3y=19-16
-3y=3
divide both sides by -3
-3y/-3 = 3/-3
y = -1
x=4, y=-1