Sandra is 18 years older than Paulo. In 13 years, Sandra's age will be twice of Paulo's age. How old is Sandra now?

Guest Jul 8, 2020

#1**+1 **

First, we should assign variables.

Sandra’s Age = X + 18

Paolo’s Age = X

In 13 years, they will be:

(X + 18) + 13 = 2(x + 13)

X + 18 + 13 = 2x + 26

X + 31 = 2x + 26

X – 2x = 26 - 31

-x/-1 = -5/-1

X = 5

Therefore, Sandra is now:

Sandra’s Age = 5 + 18 = 23

Sandra is now 23 years old.

Checking their age:

23 (Sandra) – 5 (Paolo) = 18

Unicornrabbit Jul 8, 2020

#2**+1 **

Let x be Paulo's current age and x+18 Sandra's. We form an equation of their ages in 13 years.

(x+18)+13=2(x+13)

x+31=2x+26

x=5

Sandra is x+18 so her age is **23 years old.**

gwenspooner85 Jul 8, 2020