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25= 5+10+5n What is n?

 Jan 16, 2019
 #1
avatar+4299 
+2

Hint: Try to group like terms. +5 and +10 change negative. 

 Jan 16, 2019
edited by tertre  Jan 16, 2019
 #2
avatar+102804 
+3

Thanks Tertre, that is a good response.

 

I would word it just a little differently.  I'd say

If you change one side you must do the SAME to the other side  

 

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Here is a full answer from me:        (of course I know people do not have time to give full answers very often)

 

I will do another similar question and then you can try your own one:

 

18=2+6+2t

 

First you must simplify both sides - if it is possible. 

that gives

18= 8 +2t

you can swap sides if you want to

8+2t=18

2t+8=18

 

Now you must keep the equation balanced. Just like old fasioned see-saw style scales.

I used a t but the picture uses an x, it makes no difference. 

 

 

    2t+8=18

 

If you change one side you must do the SAME to the other side

 

You want the 2 lots of t all by itself so you must get rid of 8 on the right hand side.

You can do this by subtracting 8 from BOTH sides.

    2t+8=18

2t+8-8=18-8

        2t=10

 

 

 

Now if you divide 2t by 2 you get t on its own BUT if you divide the LHS by 2 you must also divide the RHS by 2

A fraction line is the same as a divide.

 

\(\frac{2t}{2}=\frac{10}{2}\\ t=5\)

 

 

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Now try your question and let us know how you go.  We can check your answer for you if you want.   laugh

 Jan 16, 2019
edited by Melody  Jan 16, 2019
edited by Melody  Jan 16, 2019

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