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OpenStudy (anonymous):
81=27-3s
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OpenStudy (anonymous):
s=18
OpenStudy (anonymous):
-3s = 81-27 -3s = 54 ----> devide both sides by -3 s = -18
OpenStudy (anonymous):
yeah -18 my bad.
OpenStudy (anonymous):
81-27=-3s 54 = -3s s=-18
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