Sagot :
-2x + 1 = 9
Add 2x to each side of the equation:
1 = 2x + 9
Subtract 9 from each side:
-8 = 2x
Divide each side by 2 :
-4 = x
Add 2x to each side of the equation:
1 = 2x + 9
Subtract 9 from each side:
-8 = 2x
Divide each side by 2 :
-4 = x