Answer:
Your friend lunch bill is $8
Step-by-step explanation:
The bill for you and your friend lunch = $19
Meaning the sum of your lunch bill and your friend bill is $19.
To find how much your friend bill is,
Let represent your friend bill to be x and your bill to be y.
Therefore: x + y = $19
Given that your bill is $3 more than your friend.
Simple means; your bill = your friend bill + 3
Since x represent your friend bill and y represent your bill
So
y = x + 3
Therefore from: x + y = $19
Substitute the value of y = x+3
x + y = $19
x + x + $3= $19
2x = $19 - $3
2x = 16
x = 16/2
x = $8
Since x = your friend bill.
Therefore:.
Your friend lunch bill is $8
