Răspuns :
2^31+2^30+2^29=×2^8
[2^29(2^2+2^1+2^0)]:2^28=
2^29×7:2^28=
2^29:2^28×7=
=2^1×7=14
2³¹+2³⁰+2²⁹= X × 2²⁸
= 2²⁸×( 2³+2²+2) = X × 2²⁸
= 2²⁸ × 14 = X × 2²⁸
14= X × 2²⁸ ÷2²⁸=
14= X × 1= X
X= 14
2^31+2^30+2^29=×2^8
[2^29(2^2+2^1+2^0)]:2^28=
2^29×7:2^28=
2^29:2^28×7=
=2^1×7=14