How do I prove an answer right

When you ask a question and someone answers, you don´t really know if it could be the correct answer or not. You just have to put trust in that person and hope for the best lol

Step-by-step explanation:

You could prove an answer right by having proof or witnesses. Like you could say that a person who studies that subject and agrees with you has to convince that you’re right because the people that specialize in that subject know what they’re talking about so they must be able to back you up and say you’re right

Painter 1 : Painter 2 : Total
2 : 3 : 2+3
2 : 3 : 5

5 parts = $2000
1 part = $2000 ÷ 5
1 part = $400

2 parts = $400 x 2 
2 parts = $800

3 parts = $400 x 3
3parts = $1200

Painter 1: Painter2
$800 : $1200