решите уравнение:
(b+179)-89
b=56,75
(839+c)-239
c=37,98
(256-x)-156
x=44,87
238-(38+a)
a=78,0

(b+179)-89 = b + 179 - 89 = b + 90b=56,75     56,75 + 90 = 146,75(839+c)-239 = 839 + c - 239 = c + 600c=37,98      37,98 + 600 = 637,98(256-x)-156 = 256 - x - 156 = 100 - xx=44,87      100 - 44,87 = 55,13238-(38+a) = 238 - 38 - a = 200 - aa=78,0    200 - 78,0 = 122