Explain why 7 × x/7 ≡ x? i'm very confused.18 points to anyone who gets it\

What is 1/2 x (6 x 4)+3 + 2 show your work

Anyone know? will mark brainliest if correct

1. if we have 3 babies what is the probability they’re going to be all boys? 2. if we roll 2 die at the same time what is the probability of getting less than 10 on the first roll and a 5 on the second roll 3. if we have 3 babies what is the probability their is going to be 2 girls? 4. if we have 3 babies what is the probability of having no more than 1 girl? 5. it we have 3 babies and then have another 3 babies what is the probability of us having at least 1 boy and then having all girls?