First lets solve for x we know 3x=90. In this case x=30. Now we can solve for y. We know the triangle needs to equal 180 so y+2(30)=180. So we get y=120. Hope it helps
Lets say u have 1 coconut that cost 688.52 ad another 1 that cost 234.99 all you have to do is sale or buy an extra coconut to get 573.77 if that help dont forgot to drop me the brainlist