1.4x-1.85-(1.4x+3.15) x = 5.21​

-5

Пошаговое объяснение:

1.4x-1.85-(1.4x+3.15) при x=5.21​.

1.4*5.21-1.85-(1.4*5.21+3.15)

7.294-1.85-(7.294+3.15)

7.294-1.85-10.444=5.444-10.444=-5