Question

Rozwiąż zadania :

a) 6(x-4) - 2 =

b) 2 (x + 1 ) - 3 (x-1) =

c) -39y-2)+4(x+2) =

d) 5(x-y-1) - 4(x+2)

e) 2(3a+b) -2 (a-b)

Answer 1

a)
6(x - 4) - 2 =
= 6x - 24 - 2 =
= 6x - 26

b)
2(x + 1) - 3(x - 1) =
= 2x + 2 - 3x + 3 =

= -x + 5

c)
-3(y - 2) + 4(x + 2) =
= -3y + 6 + 4x + 8 =
= -3y + 4x + 14

d)
5(x - y - 1) - 4(x + 2) =
= 5x - 5y - 5 - 4x - 8 =
= x - 5y - 13

e)
2(3a + b) - 2(a - b) =
= 6a + 2b - 2a + 2b =
= 4a + 4b

Answer 2

a) 6(x-4) - 2 = 6x-24-2=6x-22

b) 2 (x + 1 ) - 3 (x-1) =2x+2-3x+3=-x+5

c) -3(9y-2)+4(x+2) =-27y+6+4x+8=4x-27y+14

na moje oko w c) miał byc nawias;)

d) 5(x-y-1) - 4(x+2)=5x-5y-5-4x-8=x-5y-13

e) 2(3a+b) -2 (a-b)=6a+2b-2a+2b=4a+4b