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OpenStudy (ny,ny):
Solve each system by elimination 4x-9y=61 10x+3y=25
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OpenStudy (espex):
If you multiply the bottom equation by 3, then add the two equation together, you will remove y and can solve for x, then plug x in and solve for y.
OpenStudy (ny,ny):
i get a really big decimal for x.
OpenStudy (espex):
Care to share your equations, something isn't right.
OpenStudy (ny,ny):
30x+9y=61 4x-9y=61 34x=86 x=?
OpenStudy (ny,ny):
ohhhh, i see my mistake. x=4?
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OpenStudy (espex):
\[[10x + 3y = 25] \times 3 \rightarrow 30x + 9y = 75\] 4x - 9y = 61 +30x + 9y = 75
OpenStudy (espex):
Yep you got it.
OpenStudy (ny,ny):
thanks.
OpenStudy (espex):
You're welcome.
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