Question 1094048
... equilateral triangle ...



{{{x+12=3x-8}}}
{{{12=2x-8}}}
{{{2x=20}}}
{{{x=10}}}



{{{3x-8=2x+2}}}
{{{x-8=2}}}
{{{x=10}}}


{{{highlight_green(x=10)}}}


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{{{highlight(22)}}}{{{units}}}, {{{each}}}{{{side}}}