Question

Помогите с учи ру, пожалуйста!!!

Answer 1

1) (2x – 3) / 9 + (x – 1) / 5 = 2

(2x – 3) · 5 + (x – 1) · 9 = 2 · 45

10x – 15 + 9x – 9 = 90

19x = 114

x = 6

2) 7x² – 14x⁵ + 21x³ = 7x²·(1 – 2x³ + 3x)

3) b(3b + 1) – 5(3b + 1) = (b – 5)(3b + 1)