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OpenStudy (tinylittlehelper):
- 3x + 7y = 2 - 2x - 3y = - 4 x = ? Please EXPLAIN why. Thanks!
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OpenStudy (astrophysics):
Any specific method?
OpenStudy (tinylittlehelper):
A simple one maybe.
OpenStudy (astrophysics):
I mean substitution, elimination, matrices, etc.
OpenStudy (tinylittlehelper):
There are no answer choices...
OpenStudy (astrophysics):
Not sure what that means, but alright lets just do substitution method, have you used that before?
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OpenStudy (astrophysics):
Since we need x, we need to pick one of the equation isolate y (get y on its own) and the plug it into the second equation.
OpenStudy (tinylittlehelper):
So... can you draw how we do that?
OpenStudy (astrophysics):
|dw:1431741593438:dw| so pick an equation, which one do you want to solve y for?
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