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Mathematics 7 Online
coltonnnnnnn:

2x+y=1 9x + 3y = -3 The x-coordinate of the point of intersection is

dude:

Okay first you want to isolate y on both equations, do you know how to do that?

coltonnnnnnn:

not really, im terrible at any form of math

dude:

Okay, let’s start with the first equation, what is the opposite of adding?

coltonnnnnnn:

subtracting lol

dude:

Right, so we subtract 2x on both sides

dude:

y=-2x+1

dude:

That is one equation done, now we have to do the second equation

dude:

9x + 3y = -3 Okay again here, what is the opposite of adding 9x?

coltonnnnnnn:

subtracting

dude:

Yes, so what would we get?

coltonnnnnnn:

3y=-9x

coltonnnnnnn:

i give up.

coltonnnnnnn:

thank you for the help dude, youre a great person

dude:

You were on the right track, you have to include the -3 at the end since it was in the original equation

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