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Mathematics 18 Online
OpenStudy (anonymous):

math helppppppp!!!!!!

OpenStudy (anonymous):

click poc

OpenStudy (anonymous):

pic sorry

OpenStudy (anonymous):

picture

OpenStudy (anonymous):

What don't you understand about substitute?

OpenStudy (anonymous):

it's that : multiply the first equation by 4, and then summ them! :D

OpenStudy (angela210793):

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