Question

1)72:(x+13)=3 2) 13(x+6)-150=123 3)13x(23-в)=247 4) (27х-561):57=38

Answer 1

1)

72:(x+13)=3

x+13=72:3

x+13 = 24

x = 24 - 13

x = 11

2)

13(x+6)-150=123

13(x+6)=123+150

13(x+6)=273

x+6=273:13

x+6=21

x=21-6

x=15

3)

13*(23-в)=247

23-b=247:13

23-b=19

b=23-19

b=4

4)

(27х-561):57=38

27x-561=38*57

27x-561=2166

27x=2166+561

27x=2727

x=2727:27

x=101