Question
Solve the equation
x=310+3log2(5)
Alternative Form
x≈5.655261
Evaluate
log10(2)×(3x−7)=3
Divide both sides
log10(2)log10(2)×(3x−7)=log10(2)3
Divide the numbers
3x−7=log10(2)3
Move the constant to the right side
3x=log10(2)3+7
Add the numbers
More Steps

Evaluate
log10(2)3+7
Reduce fractions to a common denominator
log10(2)3+log10(2)7log10(2)
Write all numerators above the common denominator
log10(2)3+7log10(2)
Rewrite in terms of common logarithms
More Steps

Evaluate the logarithm
3+7log10(2)
Rewrite in terms of common logarithms
log10(1000)+7log10(2)
Calculate
log10(1000)+log10(27)
Use the logarithm product rule
log10(1000×27)
Evaluate the logarithm
log10(128000)
log10(2)log10(128000)
Use the logarithm base change rule
log2(128000)
3x=log2(128000)
Divide both sides
33x=3log2(128000)
Divide the numbers
x=3log2(128000)
Solution
More Steps

Evaluate
log2(128000)
Use loga(x×y)=loga(x)+loga(y) to transform the expression
log2(1024)+log2(125)
Simplify the expression
More Steps

Evaluate
log2(1024)
Write the number in exponential form with the base of 2
log2(210)
Use logaan=n to simplify the expression
10
10+log2(125)
Simplify the expression
More Steps

Evaluate
log2(125)
Write the number in exponential form with the base of 5
log2(53)
Use logabn=nlogab to simplify the expression
3log2(5)
10+3log2(5)
x=310+3log2(5)
Alternative Form
x≈5.655261
Show Solution
