Question

How do you solve `4x - 9=51`?

Answer 1

x=15

Explanation:

Isolate the variable, then get rid of any coefficients

`4x-9=51`

`4x=60`

`x=15`

Answer 2

The answer is 15

Explanation:

You do the inverse operation of the 9 and add it to the 51 giving you 60 then just divide and you get your answer 15

Answer 3

`x=15`

Explanation:

`4x-9=51`

Add `9` to each side to get the `4x` by itself.

`4x -9 +9 = 51 +9`

`4x=60`

Then divide by `4` on each side

`(4x)/4=60/4`

`x=15`

Answer 4

See a solution process below:

Explanation:

First, add `color(red)(9)` to each side of the equation to isolate the `x` term while keeping the equation balanced:

`4x - 9 + color(red)(9) = 51 + color(red)(9)`

`4x - 0 = 60`

`4x = 60`

Now, divide each side of the equation by `color(red)(4)` to solve for `x` while keeping the equation balanced:

`(4x)/color(red)(4) = 60/color(red)(4)`

`(color(red)(cancel(color(black)(4)))x)/cancel(color(red)(4)) = 15`

`x = 15`