Question

i Which equation, when solved, results in a different value of x than the other three?' 7 3 4 37 X=-20 3 119-8-2014

Answer 1

You have the first equation:

`-(7)/(8)x-(3)/(4)=20`

Let's analize the others equation.

You can see that the second equation is just like the first one, but it was multiplied by -1:

`\begin{gathered} (-1)(-(7)/(8)x-(3)/(4))=(20)(-1) \\ (7)/(8)x+(3)/(4)=-20 \\ (3)/(4)+(7)/(8)x=-20 \end{gathered}`

So the value of "x" of the first one and the second one will be the same.

The third equation is:

`-7((1)/(8))x-(3)/(4)=20`

If you simplify it, you get:

`-(7)/(8)x-(3)/(4)=20`

So you can notice that the three equations are the same, therefore the result of the third one will be the same too.

You can identify that even simplifying the last equation, it is not the same equation, then you will obtain a different value of "x" than the other three.

Therefore,the answer is the Last option.