C) Uranus has three moons less than Saturn. Together, they have thirty-three moons. How many moons does each planet have?

Uranus : 15

Saturn : 18

Step-by-step explanation:

Uranus = U

Saturn = S

1) U= S -  3

2) U+ S = 33

1)* U - S = -3

2)* U + S = 33

1)* + 2)*      2U = 30, so U = 15

Then Saturn will have 18 (because they add up to 33)

x is variable or an unknown value to find

example:

2x = 5 which means x = 3

why do wages differ across industries

step-by-step explanation :

micro economists are concerned with economics on an industry or individual firm basis.

macro economists are concerned with national and international level