Question

If 7a+8b:7c+8d = 7a-8b:7c-8d , prove that: (i) a:b = c:d (ii) 4a-5b:4c-5d = 3a+4b:3c+4d

Answer 1

I solved your 1st Q. but very less space is remaining on paper so pls make another question of (ii) and put it on brainly so I can answer that too.
But for first here is the ans.
Pls pls mark as brainiest ans.and follow me.