What is the answer to 4(r+20)= 1/(5(20r+400)) ?

The answer to 4(r+20)= 1/(5(20r+400)) is r=-399/20 ,r=-401/20

Solve for r: 4(r+20)= 1/(5(20r+400))

The solution is r=-399/20 ,r=-401/20

English

Español

Português

Français

Deutsch

Italiano

Русский

中文(简体)

한국어

日本語

Tiếng Việt

עברית

العربية

Popular >

4 (r + 20) = \frac{1}{5 ( 20 r + 400 )}

r = - \frac{399}{20}, r = - \frac{401}{20}

Decimal Notation

r = - 19.95, r = - 20.05

Solution steps

4 (r + 20) = \frac{1}{5 ( 20 r + 400 )}

Multiply both sides by

20 r + 400

4 (r + 20) (20 r + 400) = \frac{1}{5}

Solve

4 (r + 20) (20 r + 400) = \frac{1}{5} : r = - \frac{399}{20}, r = - \frac{401}{20}

r = - \frac{399}{20}, r = - \frac{401}{20}

Verify Solutions

Find undefined (singularity) points:

r = - 20

Combine undefined points with solutions:

r = - \frac{399}{20}, r = - \frac{401}{20}

\frac{x - 7}{x} = \frac{8}{2 x}

\frac{40}{x + 10} = \frac{20}{x}

\frac{2 x}{x - 3} = \frac{2 x + 1}{x}

x^{- n - 1} = \frac{1}{x ^{n - 1}}

\frac{a}{x ^{2}} + b x^{2} = - 21

What is the answer to 4(r+20)= 1/(5(20r+400)) ?
The answer to 4(r+20)= 1/(5(20r+400)) is r=-399/20 ,r=-401/20
Solve for r: 4(r+20)= 1/(5(20r+400))
The solution is r=-399/20 ,r=-401/20