5+ (-3) ( 6x - 5)

which of these are equivalent to that

1. 18x−20

2. 3x−3

3. none

Afactory buys 10% of its components from suppliers b and the rest from supplier c. it is known that 6% of the components it buys are faulty. of the components brought from suppliers a,9% are faulty and of the components bought from suppliers b, 3% are faulty. find the percentage of components bought from supplier c that are faulty.