I assume the task is to simplify.
Answer: 
The value of n from the solution set is <u>3.</u>
<u>calculation:-</u>
⇒ 4n + 8 = 2
⇒ 4n = 20 - 8
= 4n = 12
= n = 12/4
⇒ n = <u>3</u>
Therefore, from the given set 3,8,10,12, the value of n will be 3.
A linear equation is an algebraic equation in which each term has an exponent of 1 or 0, and the graph of this equation is always a straight line. A measure of a metal's response to cold working. Cold working is the plastic deformation of metals below their recrystallization temperature and is used in many manufacturing processes such as wire drawing, forging, and rolling.
The value of an expression is the result of the computation described by this expression when the contained variables and constants are assigned values. In algebraic expressions, letters can be used to represent numbers. Interpret and compute all rational numbers. Add subtract multiply divide and display percentages for all decimals and fractions.
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Answer:
One pound costs 1.26, two costs 1.47, three costs 1.68, and four costs 1.89. So we calculate how much it increases in each pound.
1.26 + 21 = 1.47
1.47 + 21 = 1.68
1.68 + 21 = 1.89
1.89 + 21 = 2.10
2.10 + 21 = 2.31
2.31 + 21 = 2.52
2.52 + 21 = 2.73
8 pounds cost: 2.73
So I pay $ 2.73 for 8 pounds.
