Question

This is 6th grade work there will be more questions on this but i needed help on this

Answer 1

His awnswers true so ummmmmmmmm yeah

Answer 2

Explanation:

X + (X + 4) + (X - 7) = 54

3X - 3 = 54

3X - 3 + 3 = 54 + 3

3X = 57

3X / 3 = 57 / 3

X = 19

Y = (19 + 4) = 23

Z = (19 - 7) = 12

Sam's age = 19

Dana's age = 23

Alex's age = 12