26-(7-2x)=5x вот ещё) 19-2(3x+18)=2x-37 и ещё 23-4(3x+8)=1-17x

26-(7-2x)=5x
26 - 7 + 2x = 5x
19 + 2x = 5x
2x - 5x = -19
-3x = - 19
x = -19 : (-3)
x = 19/3 = 6 1/3

19-2(3x+18)=2x-37
19 - 6x - 36 = 2x - 37
-17 - 6x = 2x - 37
-6x - 2x = -37 + 17
-8x = - 20
x = - 20 : (-8)
x =  2,5

23-4(3x+8)=1-17x
23 - 12x - 32 = 1 - 17x
-9 - 12x = 1 - 17x
-12x + 17x = 1 +9
5x = 10
x = 10:5
x = 2