27.7k views
2 votes
Yo help i dont get this at all pls

Yo help i dont get this at all pls-example-1

2 Answers

3 votes


x~~ : ~~(x+5)~~ = ~~4~~ : ~~5\qquad \implies \qquad \cfrac{x}{x+5}=\cfrac{4}{5} \\\\\\ 5x=4x+20 \implies x=20

User Miyako
by
8.8k points
2 votes

Answer:

x = 20

Explanation:

You want to find the value of x that makes this true:

x : (x +5) = 4 : 5

Differences

You can often solve ratio questions by looking at the differences between the parts:

(x +5) - (x) = 5 . . . . . . left ratio

(5) - (4) = 1 . . . . . . . . . right ratio

This means you can get the same difference by multiplying the right ratio by 5:

x : (x +5) = 4·5 : 5·5

x : (x +5) = 20 : 25

Now, it is easy to see that x = 20.

<95141404393>

User Brian Gerstle
by
8.6k points

No related questions found

Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.

9.4m questions

12.2m answers

Categories