Question

A person owns two shops. This year the telephone bill for the first shop was $580 less than three times the telephone bill for the second shop. The total telephone expense for both shops was 52360 What was the cost of each

shop's telephone service for the year?

Telephone bill first year for the first shop is?
And the second shop is?

Answer 1

x = first shop

y = second shop

This year the telephone bill for the first shop was $630 less then three times the telephone bill for the second shop.

⇒ x = 3y - 630

The total telephone expense for both shops was $2446.

⇒ x + y = 2446

Solve by substitution -- the first equation into the second:

x + y = 2446 ⇒ (3y - 630) + y = 2446 ⇒ 4y = 3076 ⇒ y = $769

Substitute the value of y back into either of the original two equations to solve for x:

x = 3y - 630 ⇒ x = 3(769) - 630 = $1,677

x = $1,677

y = $769