Question 1077184
Wrote an equation for each statement
:
Darren is four times old as Tabitha.
d = 4t
 In twenty years, Darren will be twice as old as Tabitha.
d + 20 = 2(t+20)
d + 20 = 2t + 40
d = 2t + 40 - 20
d =2t + 20
replace d with 4t from the 1st statement
4t =2t + 20
4t - 2t = 20
2t = 20
t = 10 yrs is Tabitha's  age now
then
4(10) = 40 yrs is Darren's age
:
:
:
Check solution in the statement
"In twenty years, Darren will be twice as old as Tabitha. "
40 + 20 = 2(10 + 20)