Question

My question is -3x+7=28

Answer 1

-3x+7=28

Move +7 to the other side. Sign changes from +7 to -7

-3x+7-7= 28-7

-3x= 21

Divide by -3

-3x/-3= 21/-3

x= -7

Answer: x=-7

Answer 2

For this case we have the following equation:

`-3x + 7 = 28`

We must find the value of the variable "x":

Subtracting 7 from both sides of the equation:

`-3x = 28-7`

Different signs are subtracted and the sign of the major is placed:

`-3x = 21`

Dividing between -3 on both sides of the equation:

`x = \frac {21} {- 3}\\x = -7`

Answer:

`x = -7`