Question 838384
Angles in a triangle sum to 180.
{{{2x+10+4x-20+3x+10=180}}}
{{{9x=180}}}
{{{x=20}}}
{{{A=2x+10=40+10=50}}}
{{{B=4x-20=80-20=60}}}
{{{C=3x+10=60+10=70}}}