SOLUTION: 3x + 4 = 4x -5 3x +4-4= 4x-5-4 3x=4x-1 3x=4x-1 3 = 3 3x=3x 3 =3 x=3 I know i'm doing somthing wrong. I think i miss a step.

Algebra ->  Equations -> SOLUTION: 3x + 4 = 4x -5 3x +4-4= 4x-5-4 3x=4x-1 3x=4x-1 3 = 3 3x=3x 3 =3 x=3 I know i'm doing somthing wrong. I think i miss a step.       Log On


   

Question 148310: 3x + 4 = 4x -5
3x +4-4= 4x-5-4
3x=4x-1
3x=4x-1
3 = 3
3x=3x
3 =3
x=3
I know i'm doing somthing wrong. I think i miss a step.
Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!

3x%2B4=4x-5 Start with the given equation.


3x=4x-5-4 Subtract 4 from both sides.


3x-4x=-5-4 Subtract 4x from both sides.


-x=-5-4 Combine like terms on the left side.


-x=-9 Combine like terms on the right side.


x=%28-9%29%2F%28-1%29 Divide both sides by -1 to isolate x.


x=9 Reduce.


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Answer:

So the answer is x=9