__________
- 7y = - 35
y = 5
2x + 5 * 5 = 25
2x + 25 = 25
2x = 25 - 25
2x = 0
x = 0
Ответ : ( 0 ; 5)
2sinx*cosx*cosx=cos^2x-sin^2x-2sinx+sin^2x