Gugu is 9 years older than Sam.In 3 years time Gugu will be twice as old as Sam.How old is Gugu now?

g = 9+s

g+3 = 2(s+3)

g+3 = 2(g-9+3)
g+3 = 2g-12
g = 15

Still don’t get it

Gugu is 9 years older than Sam in 3years time gugu will be twice as old as Sam. How old is gugu now?

To solve this problem, we need to set up equations based on the information given. Let's say Sam's current age is x, and Gugu's current age is y.

From the first sentence, we know that "Gugu is 9 years older than Sam." So we can write the equation: y = x + 9.

From the second sentence, we know that "In 3 years time, Gugu will be twice as old as Sam." So we can write the equation: (y + 3) = 2(x + 3).

Now we have a system of two equations with two unknowns:
1. y = x + 9
2. y + 3 = 2(x + 3)

To solve this system of equations, we can substitute the value of y from the first equation into the second equation:

(x + 9) + 3 = 2(x + 3)
x + 9 + 3 = 2x + 6
x + 12 = 2x + 6
x - 2x = 6 - 12
-x = -6
x = 6

So, Sam is currently 6 years old.

To find Gugu's age, we can substitute the value of x into the first equation:

y = x + 9
y = 6 + 9
y = 15

Therefore, Gugu is currently 15 years old.