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April 20, 2014

Homework Help: algebra

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

if you have the sign of > or < does this also mean = ???? so confused
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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