1) -2a - 2(-a + 7) + 1= -2a + 2a - 14 + 1= 0
2) 2a - (7 - 2a= 2a - 7 + 2= 4a - 7
3) 3(-8x + 4) + 2(12x - 8) + 2= -24x + 12 + 24x - 16 + 2= 2x - 4
1) -2a - 2(-a + 7) + 1
= -2a + 2a - 14 + 1
= 0
2) 2a - (7 - 2a
= 2a - 7 + 2
= 4a - 7
3) 3(-8x + 4) + 2(12x - 8) + 2
= -24x + 12 + 24x - 16 + 2
= 2x - 4