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how do i solve linear equations

 Mar 11, 2015
 #1
avatar+11912 
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give an example and ill tell you how!

 Mar 11, 2015
 #2
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17-5(2x-9)=(-6+10)+4

 Mar 11, 2015
 #3
avatar+11912 
0

ok so lets get to work!

 

17-5(2x-9)=(-6+10)+4

 

now first of all we will multiply 5 by 2x and -9 which gives us -10x and -45.also we will subtract -6 and 10, becoz 10 is bigger with a positive sign , we will put a positive sign in 4.

 

17 - 10x - 45 = 4 + 4

 

now we will rearrange the numbers in the first expression and what do you thinka bout the second one?we will simply add the two 4's.

 

17 - 45 -10x = 8

 

now subtact 17 and 45

 

-28 - 10x = 8

 

now we will take 28 to the other side and add it to 8....we are adding it becoz when we take a number or a variable to another side we change its sign from minus to plus, multiplication to division and vice versa.

 

-10x = 8 + 28

 

-10x = 36

 

now to get x we will take -9 to the other side and divide by 36 which will give us our x....yepp

 

x = 36/10

 

now what do you think whats x

 

ofcourse x is

 

x = 3.6

 

so that easy it was!

 

any doubt....you know what to do (ask me.....incase you didnt know!)

 

 Mar 11, 2015
 #4
avatar+118612 
0

You made a little mistake Rosala,

-5 * -9 = +45

 

You have to be really careful with those minus signs - especially when they are in front of brackets like that.

 

can you fix your answer up please :)

 Mar 11, 2015

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