Question

What can you add to 70 to make 90?

Answer 1

Heyaaa dear...!!!!!!!!

70 + 20 = 90
Hence, 20 is add in 70 to make 90.

Easy nd simple..!! ☺

Answer 2

X+70=90
X=90-70
=20
So 20 should be added to 70 to make 90