Question

Help me solve this equation 3x-7=4x

Answer 1

Hey!

Let's write it,
`3x-7=4x`
Add
`7` to both sides,

`3x-7+7=4x+7`

`3x=4x+7`
Subtract
`4x` from both sides.

`3x-4x=4x+7-4x`

`-x=7`
Since we don't want a negative variable, we have to divide both sides by
`-1`.

`(-x)/(-1)=(7)/(-1)`
Our answer would be,

`x=-7`

Thanks!
-TetraFish

Answer 2

3x - 7 = 4x

We're basically just trying to take all of the variables & put it onto one side, and then move everything else to the other side :)

So, we must add 7 to both sides.

3x = 4x + 7

Then, we subtract 4x from both sides.

3x - 4x = 7

Simplify.

-x = 7

Divide both sides by -1.

x = -7

To check our work, we simply need to plug in -7 for x in our given equation :)

3x - 7 = 4x

3(-7) - 7 = 4(-7)

Simplify.

-21 - 7 = -28

-28 = -28

Therefore, x = -7

~Hope I helped!~