Eight times a number is the same as 30 less than 5 times the number. Find the number?

x = -10

Step-by-step explanation:

We just have to translate the problem correctly

>8 times a number is the same

this tells me that

>as 30 less than 5 times the number.

Now set them equal to eachother

Now isolate the variable x

the number = -10

Step-by-step explanation:

1. to find the number, make it x. then, make an equation with it.

  8x = 5x - 30

2. then, you just solve the equation

  - subtract 5x from both sides

     3x = -30

  - divide by 3

     x = -10

hopefully that makes sense! :)

option (b) is correct

step-by-step explanation:

to find the solution of this system, we need to convert it into reduced row-echelon form. we have,

after applying row operations r2 -> r2/2 and r3 -> r3/3, we get,