In that context, p stands for pence. There are 100 pence in the British pound.
14p
10p + 5p - p = 15p - p = 14p
The percentage of 14p in 4.80 can be found by dividing 14p by 4.80 and multiplying by 100. However, without knowing the value of p, it is not possible to determine the exact percentage.
6nx + 7p - 14p + 2nx + 6x = 8nx - 7p + 6x
70p
If you mean: p^2 +14p +48 then it is (p+6)(p+8) when factored
14p
14p + 14q + p - 7q - 6p = 9p + 7q
10p + 5p - p = 15p - p = 14p
(p=-15)(p=1)
The percentage of 14p in 4.80 can be found by dividing 14p by 4.80 and multiplying by 100. However, without knowing the value of p, it is not possible to determine the exact percentage.
So 3p = 12, ie p = 4
Assuming you mean 7 multiplied by just 2p and assuming that p is a variable then p is calculated by: (7 * 2p) + 3 - 8 = 6p + 29 14p - 5 = 6p + 29 14p - 6p = 29 + 5 8p = 34 p = 4.25
20% of 70p = 14p = 20% * 70p = 20%/100% * 70p = 14p
6nx + 7p - 14p + 2nx + 6x = 8nx - 7p + 6x
70p
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