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OpenStudy (anonymous):
2log(7) -2r=0
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OpenStudy (primeralph):
same base. Just throw the logs away.
OpenStudy (anonymous):
Notice, if the logarithm on both sides has the same base, then the terms of which the logarithm is being taken of for both sides are equal.\[\bf \log(10-4x)=\log(10-3x) \implies 10-4x=10-3x\]Now rearrange and solve for x.
geerky42 (geerky42):
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