Odpowiedź:
a) 3(x-3) = 3*x - 3*3 = 3x - 9 = 3x + (-9)
5(y+z) = 5*y + 5*z = 5y + 5z
4(3x-y) = 4*3x - 4*y = 12x - 4y = 12x + (-4y)
-2(7-4n) = -2*7 - (-2)*4n = (-14) - (-8n) = (-14)+8n
b)1/2(4z+2) = 1/2*4z + 1/2*2 = 2z + 1
-1/3(6b-3) = -1/3*6b - (-1/3)*3 = -2b - (-1) = -2b + 1
0,2(x-5y) = 1/5(x-5y) = 1/5*x - 1/5*5y = 1/5x - 1y = 1/5x + (-1y)
3(1/3a+1) = 3*1/3a + 3*1 = 1a + 3
Szczegółowe wyjaśnienie:
