Odpowiedź:
a) 11y-8x-12y-7xy-13x-4xy + 7 = -y+8x-7xy-13x-14xy+7 = -y-21x-11xy+7
b) (6x - 3) - (4x+5) = 6x-3-4x-5 = 2x-3-5 = 2x-8 = 2(x-4)
c) -2x-(5-x)-(-3+6x) = -2x-5+x-(-3+6x) = -2x-5+x+3-6x = -7x-5+3 = -7x -2
d) (4a-6) + (4a+6) = 4a-6+4a+6 = 4a+4a= 8a
e) 5 - [6-(x+8) - 2a] = 5- (6-x-8-2a) = 5-(-2-x-2a) = 5+2+x+2a = 7+x+2a
Szczegółowe wyjaśnienie:
