Question

the union of D,E intersection F D=3,5,7 E=2,4,6,8 F= 1,2,3,4,5 -> set theory how do i answer this question

Answer 1

D U E ={2,3,4,5,6,7,8}

F={1,2,3,4,5}

The intersection of both sets are the numbers in both: {2,3,4,5}

Answer 2

2x-11+2x-7=10