3x+6y=12 -9x+y=21

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3x+6y=12 -9x+y=21

Mathematics
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At vero eos et accusamus et iusto odio dignissimos ducimus qui blanditiis praesentium voluptatum deleniti atque corrupti quos dolores et quas molestias excepturi sint occaecati cupiditate non provident, similique sunt in culpa qui officia deserunt mollitia animi, id est laborum et dolorum fuga. Et harum quidem rerum facilis est et expedita distinctio. Nam libero tempore, cum soluta nobis est eligendi optio cumque nihil impedit quo minus id quod maxime placeat facere possimus, omnis voluptas assumenda est, omnis dolor repellendus. Itaque earum rerum hic tenetur a sapiente delectus, ut aut reiciendis voluptatibus maiores alias consequatur aut perferendis doloribus asperiores repellat.

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you have to make the variable match in both equations. The easiest way to do that would be multiply the first equation by 3
What do you need to do?

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Other answers:

don't we change the first equation into y-mx+b
−9x+y+9x=21+9x(Add 9x to both sides) y=9x+21
it depends on the statement substitution , elimination/addition , or graphing ?
^thats what i meant to ask.
substitution
aight so continue with this −9x+y+9x=21+9x(Add 9x to both sides) y=9x+21
Now that you know what y equals plug it into equation 1 3x+6(9x+21)=12 solve for x
oh I did it the other way lol
\(\color{blue}{\text{Originally Posted by}}\) @jagr2713 don't we change the first equation into y-mx+b \(\color{blue}{\text{End of Quote}}\) not necessarily, you don't have to write in slope intercept you can solve for x too.
ok well what did u get for x?
um -2 so now we plug it into y=9(-2)+21 y=3
Correct

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