Реши уравнение: 1500: (х + 400) = 3, 1500: (700-а) = 3 , 3600: (b - 100) = 6.

1500/x+400 = 3
1500=3x+1200
-3x=1200-1500
-3x=-300
x=100

1500/700-a = 3
1500=2100-3a
3a=2100-1500
3a=600
a=200

3600/b-100 = 6
3600=6b-600
-6b= -600-3600
-6b= -4200
b=700

1500 : (х + 400) = 3
х + 400 = 1500 : 3
х + 400 = 500
х = 500 - 400
х = 100


1500 : (700 - а) = 3
700 -а = 1500 : 3
700 - а = 500
а = 700 - 500
а = 200


3600 : (b - 100) = 6
b - 100 = 3600 : 6
b - 100 = 600
b = 600 + 100
b = 700