Odpowiedzi

2010-01-09T18:49:06+01:00
2a + (3a + 1) =2a+3a+1=5a+1

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

(2x + 1) + (a + 5) = 2x+1 +a+5=2x+a+6

(5x + 5) - (x - 1) =5x + 5 -x+1=4x+6


  • fhm
  • Początkujący
2010-01-09T18:50:19+01:00
A) 2a + (3a + 1) = 5a +1
b) 3x-(x + 1) = 3x - x - 1 = 2x - 1
c) (2x + 1) + (a + 5) = 2x + 1 + a + 5 = a + 2x + 6
d) (5x + 5) - (x - 1) = 5x + 5 - x + 1 = 4x + 6