If total revenue is $3000 cost of goods is $1500 and the total selling expense is $500 what is the profit for the business

Step-by-step explanation:

See attachment for complete question.

From the attachment:

Solving (a) The value of x

From the attachment:

So:

Collect Like Terms

Make x the subject

Solving (b): The value of y

So, we have:

Collect Like Terms

Make y the subject

Solving (c): The value of PQ

Substitute 12 for y

Solving (d): The value of QR

Solving (e): The value of PS

Substitute 7 for x

Solving (f): The value of PT

Substitute 7 for x and 12 for y

Solving (g): The value of PR

Because QT bisects PR,

So: