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Mathematics 9 Online
OpenStudy (idislikealgebralol):

http://prntscr.com/ddapyh

OpenStudy (idislikealgebralol):

problem is in picture!

jhonyy9 (jhonyy9):

do you know what mean substitution method ?

OpenStudy (idislikealgebralol):

Yes

OpenStudy (idislikealgebralol):

a little, it's quite confusing

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