2700+у×4=170700 помогите

Question

2700+у×4=170700 помогите

Answer 1

х*400=170700-2700

х*400=168000

х=168000/400

х=420

2700+420*400=170700

Answer 2

У*4=170700-2700
у*4=168000
у=168000/4
у=42000