Question 236460
{{{D=(a/2)(2t-1)}}} Start with the given equation.



{{{2D=a(2t-1)}}} Multiply both sides by 2.



{{{2D/(2t-1)=a}}} Divide both sides by {{{2t-1}}} to isolate 'a'.



So the solution is {{{a=2D/(2t-1)}}}