Question

Помогите соч!!!!!!!!!!!

Answer 1

Пошаговое объяснение:

1)  3/8, 2/5, 1/2

2) 2x - y = 5

y = 2x - 5

3) (12a - 9a + 3 - a)*0.5 = (2a + 3)*0.5 = a + 1.5

⇒ 0.2 + 1.5 = 1.7

4) 0.2(3x - 3.5) - 5(4.8 - x) + 0.7 = 0.6x - 0.7 - 24 + 5x = 5.6x - 24.7

5) (-3.2/0.4*(-0.15))/(-0.2*2.5 - 0.8*2.5) = 1.2/2.5(-0.2 - 0.8) = 1.2/2.5*(-1) = -0.48