Ai need help with this question ​

8x+21°+45°=90°

8x =24°

x = 3°

∴x =3°

8x+21=45     x=3

Explanation:

the exodus of these people from constantinople contributed to the revival of greek and roman studies, which led to the development of the renaissance in humanism and science. byzantine emigrants also brought to western europe the better preserved and accumulated knowledge of their own greek civilization