HELP me with this question please

Me write an equation for the interior angles of this triangle that uses the triangle sum theorem

Find a number such that if you add 8 and divide the result by 4 you will get the same answer as if you subtracted 3 from the original number and divided by 2

Farnesene is a sesquiterpene. how many different isomers arising from double-bond isomerizations are possible? g