Question

Help! with explanations if possible

Answer 1

Answer:

5

Step-by-step explanation:

1. according to the condition

$\frac{price \ radio1}{price \ radio2} =\frac{x}{y}$

2. when the both prices are increased the ratio is

$\frac{x+20}{y+20}=\frac{5}{2}$

3. when the both prices are reduced the ratio is

$\frac{x-25}{y-25} =\frac{5}{1}$

4. using the equations written in steps 2&3 it is possible to make up the system of the two equations:

$\left \{ {{\frac{x+20}{y+20}=\frac{5}{2} } \atop {\frac{x-25}{y-25}= \frac{5}{1} }} \right.$

where x=160; y=52.

5. ration x:y=5.