Why did Galileo go blind?

Galileo became completely blind by the age of 74 from a combination of cataracts and glaucoma

Explanation:

i hope this will help you :)

The truth is that Galileo became blind at the age of 72, from a combination of cataracts and glaucoma

hope it helps!

try using substitution:

x + y - 6 = x - y. (i'm not giving you the exact answer). since 0 = x - y, then sub 0 in the equation with x - y. combine your like terms, and then use inverse operations, and you'll have your answer.

: -)