Question

(y+50)×2=400-100 (3500-x)÷2=1000

Answer 1

(у+50)•2 = 400-100
(У+50)•2 = 300
У+ 50 = 300 : 2
У+50 = 150
У = 150-50
У = 100

3500-х):2 = 1000
3500 - х = 1000*2
3500-х = 2000
Х = 3500 - 2000
Х = 1500