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46
7
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16+8x-25=-7(3-x)+3x

 

anybody know the steps for solving? frown

 Nov 17, 2021
 #1
avatar+63 
0

The first step is to add all the like terms on each side. once you get that done you can move the like numbers to the other side in which it belongs. To put it simply, this is like finding a missing number, you should once you find an answer get the same number on both sides.

 

 

 

remember when doing this, negative numbers when moved become positive so add that to the other side.

 

 

example

 

3r+42=36+4r

1)look for like terms

2)subtract 3r to the other side of equal sign-> 3r+ 42=36+4r-3r

3) do the same steps for 36. you should end up with 6=r

4) plug the answer into the original equation. 

 Nov 17, 2021
 #3
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Thank you

Guest Nov 17, 2021
 #2
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8x + ( 16-25)    =   7x - 21 + 3x

8x - 9               = 10x - 21

- 9 + 21 = 10x - 8x

12 = 2x

x = 6

 Nov 17, 2021
 #4
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Interestingly enough, I got 2.5 for my answer.

Guest Nov 17, 2021
 #5
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-1

Interestingly enough...YOU are correct !

 

 

8x + ( 16-25)    =  21-7x + 3x

8x - 9               = 21-4x

8x+4x     = 21 + 9

12x = 30

x = 2.5  

Guest Nov 17, 2021
 #6
avatar+32741 
+2

No!  The right-hand side of your first line should be -21 + 7x + 3x.

 

The correct answer is 6.

Alan  Nov 17, 2021
 #7
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0

First guest has it correct..... second guest didn't use  - 7   but used  + 7 in the right hand expansion.

Guest Nov 17, 2021

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