Question

7. BRIDGES The total length of wire used in the

cables supporting the Golden Gate Bridge in
San Francisco is about 80,000 miles. This is
5,300 miles longer than three times the
distance around Earth at the Equator. What
is the distance around Earth at the Equator?

Answer 1

The distance around Earth at the Equator is about 24,900 miles

Explanation:

Let

x -----> the distance around Earth at the Equator

we know that

The linear equation that represent this scenario is

`80,000=3x+5,300`

Solve for x

Subtract 5,300 both sides

`80,000-5,300=3x`

`74,700=3x`

Divide by 3 both sides

`74,700/3=x`

Rewrite

`x=24,900\ miles`

therefore

The distance around Earth at the Equator is about 24,900 miles