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starfish33
 3 years ago
2x+y=1
9x + 3y = 3
The xcoordinate of the point of intersection is
starfish33
 3 years ago
2x+y=1 9x + 3y = 3 The xcoordinate of the point of intersection is

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starfish33
 3 years ago
Best ResponseYou've already chosen the best response.0how do you get rid of the y

Mandolino
 3 years ago
Best ResponseYou've already chosen the best response.1There are two ways to get x. The socalled substitution method: Solve the first equation for y to get y=12x, then sub 12x into the x in the second equation: 9(12x)+3y=3 Then solve for y, and back sub to get x

MathsBoy
 3 years ago
Best ResponseYou've already chosen the best response.0You can multiply the first equation throughout by 3, then subtract the first from the second.

Mandolino
 3 years ago
Best ResponseYou've already chosen the best response.1I would rather multiply the first equation by 3 to get 6x3y=3 and add it to the second equation which will eliminate the y: 6x+9x3y+3y=33 or 3x=6 or x=2

Mandolino
 3 years ago
Best ResponseYou've already chosen the best response.1This is called the linear combination method or the elimination method
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