A few days ago
hey

can you give me some notes or ideas about solving a system of equations by linear combination….. 10 points for the best one

A few days ago
pickles8poop

This would be best solved by an example.

Say we have the equations 2x-2y=3 and 3x+2y=12. So first you set them on top of each other. Then, you make it so that one variable in one equation cancels out the same variable in the other one, in this case, 2y and -2y cancel each other out, so we can proceed to the next step. Add the equations(without the cancelled out variables), so that it will be 5x=15, or x=3. Next, you plug in 3 for x in both equations to find y. You should get the same answer for y in both equations. Therefore, the coordinate point where the lines cross is 3,3/2. You can also graph the lines to check your answer.

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A few days ago
Nunya
Linear equations aren’t all that difficult. Ordered sets. Plot two sets, and any point on that linear is a solution.
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A few days ago
Anonymous
to solve a system of linear equations first, you graph one line, then you graph the other line, and then u see where the points meet and thats the answer. if they are the same line, then write all real number solutions, and if they are parallel and never touch, write no real number solution. thats as simple as it gets
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A few days ago
?
i didn’t study that at school yet
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