Question 7547
To get from {{{2x+1=15}}} to {{{2x=14}}}, you would subtract 1 from both sides of the first equation.

To find the value of x that makes these equations equivalent, in {{{2x = 14}}}, divide both sides by 2.

{{{2x = 14}}} Divide both sides by 2.
{{{x = 7}}} 

You can check this yourself by substituting 7 for x in each equation.