2(2p + 5q)
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4p+1 = 10 4p = 10-1 4p = 9 p = 2.25
5*(2q + 5r)
Oh, isn't that just lovely? When you have 5q plus 5q, you can combine them to make 10q. It's like adding 5 happy little clouds to another 5 happy little clouds to create a beautiful sky full of 10 happy little clouds. Just remember, there are no mistakes in math, only happy little accidents.
15 + 3 = 7p - 4p ie 18 = 3p so p = 6
There is no equation (nor inequality in the question and so there is nothing to solve.The expression can be simplified to 4p - 16 which can be factorised to 4*(p - 4). That is as far as you can go.