Question 372631
{{{A+B+C+D=360}}}
.
.
{{{A=C}}}
{{{B=D}}}
.
.
{{{2A+2B=360}}}
{{{A+B=180}}}
.
.
I'm assuming {{{B=4x+40}}}??
.
.
{{{3x+4x+40=180}}}
{{{7x=140}}}
{{{highlight(x=20)}}}
.
.
{{{A=C=60}}}degrees
{{{B=D=4(20)+40=120}}}degrees