Question 1088200
Graphically,
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*[illustration pl4.JPG].
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Algebraically,
{{{ln(5^(1-7x))=ln(4^x)}}}
{{{(1-7x)*ln(5)=x*ln(4)}}}
{{{ln(5)=x(7ln(5)+ln(4))}}}
{{{x=ln(5)/(7ln(5)+ln(4))}}}