If, in 7 years, susan will be 2 times as old as she was 3 years ago, what is susan’s present age? pleaze explain how and do it with using x

Let Susan's present age be x

Now, after 7 years ( her age will become 7 +x then) she'll be 2 as old she was 3 years ago.

Her age 3 years ago must be x-3

Now according to question,

twice Her age 3 years ago = her age after 7 years

now,

2(x-3) = 7+x
2x-6 = 7+x
2x-x =7+6
x = 13
x = 13

Therefore, her age presenr age is 13 years.

No a triangle cannot be formed because when you add the two smallest number together (which would be 11) the have to be bigger than the number it is "against" ( which would be 12)

Hello!
volume of sphere =4/3.pi.r^3