SOLUTION: Ok so I don't know how to justify my answer. So the problem is 4n+8+7=25 so I worked it out and got 5/2 but how do i explain what I did in words ?

Algebra ->  Equations -> SOLUTION: Ok so I don't know how to justify my answer. So the problem is 4n+8+7=25 so I worked it out and got 5/2 but how do i explain what I did in words ?      Log On


   

Question 985110: Ok so I don't know how to justify my answer. So the problem is 4n+8+7=25 so I worked it out and got 5/2 but how do i explain what I did in words ?
Answer by josgarithmetic(39617) About Me  (Show Source):
You can put this solution on YOUR website!
4n%2B8%2B7=25 the given equation

4n=25-8-7

4n=25-15

4n=10

4n%281%2F4%29=10%281%2F4%29

One would imagine, if you took the steps this far, even to the end, you know what and why you did what you did. You want to give a formal justification for each step. Refer to the properties of real numbers which you are studying: Addition Property of Quality, Additive Inverses, Multiplication Property, Multiplicative Inverse, Commutative Property for Addition.