Question 1038039
Easier if you try to draw the figure after getting a better sense of the <s>sides</s> angles from the solution.


{{{(75-x)+(35+x)+2x=180}}}

{{{110+2x=180}}}

{{{55+x=90}}}


{{{x=90-55}}}


{{{x=35}}}


40, 70, 70
Isosceles Triangle