Question

Please help with this 1 question! -3-||

Answer 1

Explanation

• Get rid of the denominator by multiplying the whole equation with 100x.

$\frac{20}{100} (100x) = \frac{80}{x} (100x) \\ \frac{20}{ \cancel{100}}( \cancel{100} \: \: x) = \frac{80}{ \cancel{x}} (100 \cancel{x}) \\ 20x = 80(100) \\ 20x = 8000$

• Solve the equation for x-term.

$x = \frac{8000}{20} \longrightarrow \frac{800 \cancel{0}}{2 \cancel{0}} \\ x = \frac{800}{2} \longrightarrow \frac{ \cancel{800} \: \: 400}{ \cancel{2} \: \: 1} \\ x = 400$

• Answer Check

Substitute x = 400 in the equation.

$\frac{20}{100} = \frac{80}{400} \\ \frac{ \cancel{20} \: \: \: 1}{ \cancel{100} \: \: \: 5} = \frac{ \cancel{80} \: \: \: 1}{ \cancel{400} \: \: \: 5} \\ \frac{1}{5} = \frac{1}{5}$

The equation is true for x = 400. Therefore the answer for equation is x = 400.

Answer

$\large\boxed{x = 400}$

Answer 2

Answer: 400

Explain: Just do 80/20 and get 4 then do 100 times 4

回答：400

説明：80/20を実行して4を取得し、次に100回4を実行します