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OpenStudy (ineedhelpfast12):
solve the linear system using substitution. 2x-y=23 x-9=-1
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OpenStudy (wilsondanielle):
the second equation gives you the value of x (-1+9=8)...
OpenStudy (ineedhelpfast12):
y=-7 x=8
OpenStudy (wilsondanielle):
If you HAVE to do substitution : 2(8) - y = 23 16 - y = 23 23-16 = 7 = -y -y = 7
OpenStudy (ineedhelpfast12):
thanks
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