SOLUTION: pre algebra home work. Solve the following equations. Show all work and circle your answers. 1. -X = 25 - 6x 2. 9 -6x = 3 3. -7 = 8x = -39 Could you please explane

Algebra ->  Signed-numbers -> SOLUTION: pre algebra home work. Solve the following equations. Show all work and circle your answers. 1. -X = 25 - 6x 2. 9 -6x = 3 3. -7 = 8x = -39 Could you please explane      Log On


   

Question 54038: pre algebra home work.
Solve the following equations. Show all work and circle your answers.
1. -X = 25 - 6x 2. 9 -6x = 3 3. -7 = 8x = -39

Could you please explane how the problems would be solved.
Answer by funmath(2933) About Me  (Show Source):
You can put this solution on YOUR website!
There's a typing error on number 3, let me know what you meant for that one and I'll edit this response.
The goal is to get the x all by itself on one side of the equal sign. This will tell you what number x would have to be in order to make both sides equal each other. What ever we need to move we do the opposite operation to it on both sides of the = sign, for example if something is being added and you want to move it it would be subtracted from both sides of the equation, if it were being multiplied, you'd divide it, ect.
Another tip is:
Any number divided by itself is 1.
8%2F8=1
1 times anything is anything.
1*x=x
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1.
-x=25-6x
6x-x=25-6x%2B6x
5x=25
5x%2F5=25%2F5
cross%285%29x%2Fcross%285%29=5
highlight%28x=5%29
To check if you're right substitute 5 in for x in the original equation and simplify to see if both sides equal.
-5=25-6%285%29
-5=25-30
-5=-5 We're right!!!
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2.
9-6x=3
-9%2B9-6x=3-9
-6x=-6
-6x%2F-6=-6%2F-6
cross%28-6%29x%2Fcross%28-6%29=1
highlight%28x=1%29
Check:
9-6%281%29=3
9-6=3
3=3 We're right again!!!
3. waiting for your response.