Answer:
9
Step-by-step explanation:
let the number be x
double it = x+x = 2x
then add seven = 2x+7
i get 25 2x+7= 25
subtract 7 from both sides
2x= 25-7= 18
2x= 18
x= 18/2 = 9
25-7=18
half of 18 is 9
d is 456
a is 90.60
b is 14.38
3(3b + 4)
the GCF is 3