SOLUTION: Please help me solve this problem too! Solve: 4/3x + 1/2y =4 2/3x - 7/12y=-3 Thank you!

Algebra ->  Rational-functions -> SOLUTION: Please help me solve this problem too! Solve: 4/3x + 1/2y =4 2/3x - 7/12y=-3 Thank you!      Log On


   



Question 203636: Please help me solve this problem too!
Solve:
4/3x + 1/2y =4
2/3x - 7/12y=-3
Thank you!

Found 2 solutions by Earlsdon, stanbon:
Answer by Earlsdon(6294) About Me  (Show Source):
You can put this solution on YOUR website!
Solve:
1) %284%2F3%29x%2B%281%2F2%29y+=+4
2) %282%2F3%29x-%287%2F12%29y+=+-3
Multiply equation 2) by 2 and subtract the result from equation 1)
1) %284%2F3%29x%2B%281%2F2%29y+=+4
2a) %284%2F3%29x-%2814%2F12%29y+=+-6
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3) %2820%2F12%29y+=+10 Multiply both sides by 12%2F20
3) highlight%28y+=+6%29 Now substitute this into equation 1) and solve for x.
1a) %284%2F3%29x%2B%281%2F2%29%286%29+=+4
1a) %284%2F3%29x+%2B+3+=+4 Subtract 3 from both sides.
1a) %284%2F3%29x+=+1 Multiply both sides by 3%2F4
1a) highlight_green%28x+=+3%2F4%29
The solution is: (3%2F4, 6)

Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
4/3x + 1/2y =4
2/3x - 7/12y=-3
--------------------------
Multiply thru the 1st equation by 6
Multiply thru the 2nd equation by 12
--------------------------
8x + 3y = 24
8x - 7y = -36
------------------------
Subtract the 2nd from the 1st to solve for "y":
10y = 60
y = 6
------------
Substitute into 8x + 3y = 24 to solve for "x":
8x + 18 = 24
8x = 6
x = 3/4
-----------------
Ans: (3/4 , 6)
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Cheers,
Stan H.