SOLUTION: Method Substitution
5. Find the point of intersection of each pair of lines.
b) 4x+2y=7
-x-y=6
Please, i dont know how to do it thank you very much!!!!
Algebra ->
Quadratic Equations and Parabolas
-> SOLUTION: Method Substitution
5. Find the point of intersection of each pair of lines.
b) 4x+2y=7
-x-y=6
Please, i dont know how to do it thank you very much!!!!
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Question 183855: Method Substitution
5. Find the point of intersection of each pair of lines.
b) 4x+2y=7
-x-y=6
Please, i dont know how to do it thank you very much!!!! Answer by stanbon(75887) (Show Source):
You can put this solution on YOUR website! Find the point of intersection of each pair of lines.
b) 4x+2y=7
-x-y=6
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Leave the 1st equation along;
Multiply the 2nd equation by 4.
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4x + 2y = 7
-4x- 4y = 24
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Add the two equations to eliminate the x-terms:
-2y = 31
y = -31/2
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Substitute into -x-y = 6 to solve for "x":
-x -(-31/2) = 6
x + 31/2 = 12/2
x = -19/2
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Cheers,
Stan H.
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