Question

решите уранения(x+5,7):5,1=2

Answer 1

( x + 5.7 ) : 5.1 = 2
( x + 5.7 ) = 2 · 5.1
  x + 5.7 = 10.2
  x = 10.2 - 5.7
  x = 4.5

Ответ: x = 4.5