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April 20, 2014

April 20, 2014

Posted by **confused** on Thursday, May 24, 2007 at 9:16pm.

my problem is -3x+2y=7

x+4y=-7

how do I do this? please help

No. The sign < or> does not include equal. On computers we often just do this => for equal or greater than. or this: >=.

In texts, it is often this way: ≥

Your problem. Multiply the second equation by 3, then add the equations.

-3x+2y=7

3x+12y=-21

adding...

0x +14y=-14

solve for y, then go back substuting in y, and solve for x.

Your problem. Multiply the second equation by 3, then add the equations.

-3x+2y=7

3x+12y=-21

adding...

0x +14y=-14

solve for y, then go back substuting in y, and solve for x.

thank you for your help it is very helpful to me.

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