Give me 3 branlys and get 100 points

What is the value of x in the equation7x+2y=48 when y=3

Parallelogram efgh is a rectangle. he = 6, and fe = 8. find ge: and find fj:

There are 1872 steps in a building that has 104 floors. each floor has the same number of steps. a second building has the same number of floors but 2 fewer steps between each floor. how many steps are there between each floor of the second building?