Could you write a longer question? Generally, the x means times. Like my hand is seven times bigger than my son's hand. But if it's clothing it means extra-large.
Assume you mean -7x-2=0 solve for x -7x-2=0 -7x=2 -x=2/7 X=-2/7
If you mean: 7x-2 = 5x+16 then the value of x works out as 9
If you mean: 7x-53 = 9x Then the solution is: x = -26.5
If you mean: 7x+21 = 105 Then the solution is: x = 12
If you mean: 4x squared+7x+4 then the discriminant is -15
7x is a little longer
Assume you mean -7x-2=0 solve for x -7x-2=0 -7x=2 -x=2/7 X=-2/7
If you mean: 7x-2 = 5x+16 then the value of x works out as 9
If you mean: 7x-53 = 9x Then the solution is: x = -26.5
If you mean: 7x-30 = 180 then the value of x is 30
If you mean: 7x+21 = 105 Then the solution is: x = 12
If you mean: 7x = 49 then the value of x is 7
If you mean: 7x-2 = 5x+16 then the value of x works out as 9
If you mean: y = -7x then the slope is -7 and there is no y intercept
Assume you mean -7x-2=0 solve for x -7x-2=0 -7x=2 -x=2/7 X=-2/7
seven times / 7x
Do you mean x2+7x+12? If so then it is: (x+3)(x+4)