Question 393244
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Hi
Paul counted 45 heads
Let x and (45-x)represent the number of goats and chickens respectively
Question states***
 4x + 2(45-x) = 150 legs
solving for x
 4x + 90 -2x  = 150 
    2x = 60
     x = 30, the number of goats. 15 the number of Chickens  (45-20)

CHECKING our Answer
 30*4 + 15*2 = 120 + 30 = 15 legs