решите примеры : 4) x + ( x + 4 ) = 22 . 5) ( x - 7 ) + x = 33 . 6) x + ( x - 1 ) = 40 ​

4)x+x+4=22

2x+4=22

2x=18

x=9

5) x-7+x=33

2x-7=33

2x=40

x=20

6) x+x-1=40

2x-1=40

2x=41

x=20,5