Question

The price for calculating the price to deliver a parcel of mass m kg is price ($) = 7 + 3.5m

What is the mass, in kg, of a parcel with a delivery price of $70?

Answer 1

Answer: x = 18

Explanation:

Rearrange the terms

70 = 7 + 3.5 × x

Calculate

-3.5x = 7 -70

Divide Both Sides

-3.5x = -63

x =
`(-63)/(-3.5)`

x = 18