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OpenStudy (cookiemonster2412):
HELP!!! 12r^2=7r^2+20
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OpenStudy (raffle_snaffle):
solve for r?
OpenStudy (cookiemonster2412):
yes
OpenStudy (shamil98):
12r^2 = 7r^2 + 20 5r^2 = 20 r^2 = 4 \[\ r = \pm 2\]
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