Question

2raise to 30 +2raise to 29 +2raise to 28÷2raise to 31+2raise to 30 -2raise to 29) =7÷10

Answer 1

(2^30 +2^29+2^28)/ (2^31 + 2^30-2^29)

= 2^28(2^2 + 2^1 +2^0) / 2^28( 2^3+2^2-2^1)

= (2^2 + 2^1 +2^0) / ( 2^3+2^2-2^1)

= (4+2+1)/ (8+4-2)

= 7/10