Question

Usuń nawiasy i zredukuj wyrazy podobne:
a)(3x – 1) + (4x – 7) =
b)(4a – b) – (2a + 3b)=
c)(- 2y + 7x) – (8y – 2x)=
d)– ( 2x – 3y) – ( - 4x +7y)=

Answer 1

Odpowiedź:

a) (3x – 1) + (4x – 7) = 3x - 1 + 4x - 7 = 7x - 8

b) (4a – b) – (2a + 3b ) = 4a - b - 2a - 3b = 2a - 4b

c) (- 2y + 7x) – (8y – 2x) = - 2y + 7x - 8y + 2x = -10y + 9x

d) – ( 2x – 3y) – ( - 4x +7y) = - 2x + 3y + 4x - 7y = 2x -4y