You went to lunch with your friend and the bill was $19 your lunch is three dollars more than your friends how much was your friends lunch

Let x = cost of your friend's lunch.

x + x + 3 = 19

x= 8

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

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step-by-step explanation:

answer: y = -12x + 108

step-by-step explanation: do (y = m x+b) formula.