Thursday, June 25, 2015

5(2+n) = 3(n+6)

In order to to solve the equation and to find the value of
n for the identity to be tru, we'll follow the steps:


-
First, we'll remove the brackets, both sides:


5(2+n) =
3(n+6)


10 + 5n = 3n + 18


-
Now, we'll isolate the terms that contain "n", to the left side. For this reason, we'll
subtract 3n both sides:


10 + 5n - 3n = 3n - 3n +
18


We'll reduce like terms and we'll
get:


10 + 2n = 0 + 18


 - Now,
we'll subtract 10 both sides:


10 + 2n - 10 = 18 -
10


We'll reduce like terms and we'll
get:


2n = 8


We'll divide by 2,
both sides:


n =
8/2


n =
4


So, the solution of the
given equation is n = 4.


- To verify the
equation, we'll input the value 4 in the given
expression:


5(2+4) =
3(4+6)


We'll calculate the sum in each pair of
brackets:


5 * 6 = 3 * 10


30 =
30


The identity is verified for n = 4, so the
solution n = 4 is valid.

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