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OpenStudy (anonymous):
Solve the system by substitution {3x+y-2x=22 {x+5y+z=4 {x=-3z
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OpenStudy (nightwielder):
substitution means to plug in
OpenStudy (anonymous):
right
OpenStudy (nightwielder):
oops. x=-3z
OpenStudy (nightwielder):
plug in x=-3z (-3z)+5y+z=4 5y-2z=4 5y=2z+4 y=2/5z+4/5
OpenStudy (nightwielder):
plug x= and y= 3(3z)+(2/5z+4/5)-2z=22 9z-2z+2/5z+4/5=22
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OpenStudy (anonymous):
I think I understand
OpenStudy (anonymous):
what else?
OpenStudy (nightwielder):
more coming
OpenStudy (nightwielder):
|dw:1412899721501:dw|
OpenStudy (nightwielder):
|dw:1412899754963:dw|
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