Odpowiedź:
Zad.1
a) -12a + 7ab - 24a - 17ab + 3a =-33a-10a
b) -27-14x - 6t + 9x - 15t-25 =-5x-21t-52
c) – 12,5x – y + 1,5x - 4,5y =-11x-5y
d) –23,5x – 27 – 7,5x +8+ x =-31x-19
Zad.2
a) (7x - 17y-6)-(19x – 29y+8)=7x-17y-6-19x+29y-8= -12x12y-14
b) (-18a-9b-17) + (3a - 4b - 15) =-18a-9b-17+3a-4b-15=-15a-13b-32
c) -(- 18x + 5y - 10)-(- 13x – 6 – 7) =18x-5y+10+13x+6+7=31-5y+23
d) (-x-17y)-(29x + 7y ) =-x-17y-29x-7y=-30x-24y
Szczegółowe wyjaśnienie:
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Odpowiedź:
Zad.1
a) -12a + 7ab - 24a - 17ab + 3a =-33a-10a
b) -27-14x - 6t + 9x - 15t-25 =-5x-21t-52
c) – 12,5x – y + 1,5x - 4,5y =-11x-5y
d) –23,5x – 27 – 7,5x +8+ x =-31x-19
Zad.2
a) (7x - 17y-6)-(19x – 29y+8)=7x-17y-6-19x+29y-8= -12x12y-14
b) (-18a-9b-17) + (3a - 4b - 15) =-18a-9b-17+3a-4b-15=-15a-13b-32
c) -(- 18x + 5y - 10)-(- 13x – 6 – 7) =18x-5y+10+13x+6+7=31-5y+23
d) (-x-17y)-(29x + 7y ) =-x-17y-29x-7y=-30x-24y
Szczegółowe wyjaśnienie: