That is an example of a wrong solution :]
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If 2x - 13 = 5 then 2x = 5 + 13 (we have in effect added 13 to both sides of the equation in this step) 2x = 18 x = 9.
2x + 5 = 31 2x = 31 - 5 = 26 x = 13
Here is the answer with Steps: 15x - 18 = -2x - 5 15x = -2x + 13 17x = 13 x = 13/17 x ~ .764705882
-2x+5=13 you subtract 5 away from +5 and this cancels out. you then do the same to the other side by taking 5 away from 13 therefor you get 8. Now you have -2x=8, take -2x and divide it into 8 and you get 4.
2x - 5 = 13 is an equation.To solve for x, first add 5 to both sides:2x = 18Now divide both sides by 2:x=9