a) 2a + (3a + 1) = b) 3x-(x + 1) = c) (2x + 1) + (a + 5) = d) (5x + 5) - (x - 1) =

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

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