Y = f(3f - 4g + 3) +7g(3f - 4g + 3)
= 3f^2 - 4fg + 3f + 21fg - 28g^2 + 21g
= 3f^2 + 3f + 17fg + 21g - 28g^2
The factored form would be (3x-9)(x-1)
The picture should help a bit
3 | x+12 |=6
Start by distributing 3 to both x and 12
You get 3x+36=6
Subtract 36 from both sides
You then get 3x=-30
Divide 3 from both sides getting
x= -10
If you do 130 divided by 7, you get 18 with a remainder of 4. The answer is 18 cards on each page.
14 - 6 = 8 this is the answer
