Question

упростите выражение
-3(1.2x-2)-(4-4.6x)+6(0.2x-1) при x= -15/22

Answer 1

$-3(1,2x - 2) - (4-4,6x) + 6(0,2x - 1) = -3,6 x + 6 - 4 +4,6x + 1,2x - 6 = 2,2x - 4$

При x = $-\frac{15}{22}$:

$2,2*(-\frac{15}{22}) - 4 = \frac{22}{10} * (-\frac{15}{22}) - 4 = -\frac{22*15}{10*22} - 4 = -\frac{3}{2} - 4 = -1,5 - 4 = -5,5$

Ответ: -5,5