Respuesta :
Answer:
Daily allowance of Lily's brother is approximately $10.
Step-by-step explanation:
Let L represents Lily's daily allowance and let B represents her brother's daily allowance, we can therefore obtain the following from the question:
L - B = $8 ........................ (1) => Indicating the difference in their pocket money
(2/3)L = B + $2 ..................... (2) => Indicating Lily's allowance is $2 more than what her brother gets
From equation (1), we find L as follows:
L = $8 + B ...................................... (3)
Substituting L from equation (3) into equation (2) and solve for B as follows:
(2/3)($8 + B) = B + $2
0.67($8 + B) = B + $2
$5.36 + 0.67B = B + $2
$5.36 - $2 = B - 0.67B
$3.36 = 0.33B
B = $3.36 / 0.33
B = 10.18, or $10 approximately.
Therefore, daily allowance of Lily's brother is approximately $10.
Confirmation Note:
Note that this is not part of the answer to the question. It is just meant to assist you in having a deeper understanding of the question and the answer.
The above answer can be confirmed as follows:
Substituting B = $10 into equation (3), we have:
L = $8 + $10 = $18
This implies that Lily's daily allowance is $18.
Substituting for L = $18 and B = $10 into equation (1), we have:
$18 - $10 = $8 => this confirms that the difference in their pocket money is $8.
Also, substituting for L = $18 and B = $10 into equation (2), we have:
(2/3)18 = 10 + $2 => 12 = 12 => since 12 minus 10 is equal to $2, this confirms that 2/3 of lily's allowance is $2 more than what her brother gets.
