3x plus 8 equals -7 find x with work?

Answer 1

3x + 8 = -7

Subtract '8' from both sides

3x - 9 + 8 = -8 -7

3x = -15

Divide both sides by '3'

3x/3 = -15/3

x = -5 The answer.

NB 'When saying/writing ' both sides' , remember the 'equals' sign . You MUST keep the equation 'equal/ balanced' like a pair of weigh scales.

So whatever you do to one side , in the way of '+, -, x, /.' you MUST do to the other

Answer 2

To solve 3x + 9 = -7 for x, first subtract 9 from both left and right sides:

3x + 9 - 9 = -7 - 9, or

3x = -16.

Now, divide both sides by 3 to obtain x.