Simplifying algebraic expressions

Front

3(9a + 6b) ; a = 3 and b = 4

Back

153

Front

-2(-6 + 3w) + 5y ; y = 4 and w = 5

Back

2

Front

-6(-7a + 3b) ; b = 9 and a = 6

Back

90

Front

3(-7q + 5) - 6r ; q = 7 and r = 9

Back

- 186

Front

-9(7d + 2e) ; e = 8 and d = 4

Back

- 396

Front

Two thirds of students in a class study math and the remaining eight students do not study math. What is the total number of students in this class?

Back

24

Front

Total number of biscuits in 2 bags with q packets and r biscuits per packet.

Back

2qr