98x-5a(65x+2)-9(8x-7)

6298x - 5a

Step-by-step explanation:

98x x 65x = 6370x

9 x 8x = 72x

6270x - 72x = 6298x

(all we have left now is the 5a)

6298x - 5a

Part A:4m + 12 + 20m

2 (2m + 6 + 10m)

Part B: 2 (2m + 6 + 10m) = 4(m + 3 + 5m)

4m + 12 + 20m = 4m + 12 + 20m

24m + 12 = 24m + 12

Part C: if m equals 2,

4(m + 3 + 5m)

compile it down

4(2 + 3 + 5 x 2)

4(5 + 5 x 2)

4(10 x 2)

4(20)

4 times 20

80