6a - 8 - 4a - 2 → 6a - 4a - 8 - 2 → 2a - 10
2a*3 = 8+4a 6a = 8+4a 6a-4a = 8 2a = 8 a = 4
4a-2 = 2
4a+8a = 12a 12a divided by 2 = 6a
If you mean: -10(-6a-4)-9(2+4a) then it is 24a+22 simplified
6a + (7b - 4a - 8b) = (6a - 4a) + (7b - 8b) = 2a - b
10
to solve this expression: 10a-4(a+2) -> 10a-4(a)-4(2) -> 10a-4a-8 -> 6a-8
21a - 6a
10a-37=6a+51 -6a -6a subtract 6a from both sides and the 6a's cancel 4a-37=51 +37 +37 4a=88 /4 /4 a=22
12a
Add them together: 3a+4a-a = 6a