Let us solve the equation for x:
9 - x = -2(2x - 3)
Fisrt develop -2(2x - 3) :
-2*2x + (-2*-3) = -4x + 6
Now the equation is:
9 - x = -4x + 6
Subtract -9 in both sides and simplify
9 - x -9 = -4x + 6 - 9
-x = -4x -3
Add 4x in both sides
-x + 4x = -4x -3 +4x
3x = -3
To solve the x, divide by 3 both sides
3x /3= -3/3
x = -1
