Question 1193349

 

{{{AC}}} and {{{BD}}} are the diagonals; the diagonals of an isosceles trapezoid are {{{congruent}}}.

{{{AC = BD }}}

{{{3(x + 7) = 8(x-6)}}}

{{{3x + 21 = 8x -48}}}

{{{48 + 21 = 8x -3x}}}

{{{69 = 5x}}}

{{{x=69/5}}}

{{{x=13.8}}}