Question

If P=4a-4b-4c and Q=7a+7b-c; find the value of 2P+3Q​

Answer 1

Step-by-step explanation:

$P = 4a - 4b - 4c \\ Q = 7a + 7b - c \\ \\ 2P + 3Q \\ 2(4a - 4b - 4c) + 3(7a + 7b - c) \\ = 8a - 8b - 8c + 21a + 21b - 3c \\ = 8a + 21a - 8b + 21b - 8c - 3c \\ = \underline{ \underline{29a + 13b - 11c}}$