Question

I need help ASAP! Number 9 Full explanation is needed

Answer 1

Answer:

The boy's age is 8, the younger brother's age is 4.

• What we know is that the first brother has to be 8, because the equation given is x = y(younger brother) + 8
• Now we must solve the equation based off of this.

$x = y + 8\\x(likely~8?) + 4 = 2 * (y + 4)$

• Hmm. What would the product of twice the sum of the younger brother's age be?

$x = 2*y$

• If we have already found out that the older brother's age is currently 8, we know that that 8 + 4 is 12, and in that case, the 2 must be the current age apart the brothers are, 2 years. And that would mean the younger brother is 4. Let's finish the equation.

To find the younger brother's age using the given values...

$8 + 4 = 12$

That said, everything matches up with the equation. The first brother is twice the age of his younger brother.

Answer 2

• Age of brother=x
• Age of boy be x+8

After four years their age..

• brother=x+4
• Boy=x+8

So

ATQ

• Boy will be twice as brother
• 2(x+4)=x+8
• 2x+8=x+8
• x=2x

We need to solve through equation then

• x=y+8
• x+8=2y+8=>x=2y

Now

From both

• y+8=2y
• y=8yrs

Now younger brother=8-4=4yrs