Question

12(a + b) + 4(2a + b) − 6(a + 3b) simplify the expression

Answer 1

14a - 2b........................

Answer 2

=12(a + b) + 4(2a + b) − 6(a + 3b)
=12a + 12b + 8a + 4b - 6a - 18b

Now, Try to put every a's together & every b's together,
= (12a+8a-6a) + (12b+4b-18b)
= 14a - 2b

In short, Your Answer would be 14a - 2b

Hope this helps!