Question 353730
Hello, 
We can set up 2 equations. Let c represent cranes and z will be zebras.
c+z=18
2c+4z=60
Multiply the first by -2 to get:
-2c-2z=-36
Add this to the second equation to get:
2z=24
Divide by 2 to get:
z=12
There we go. 12 zebras and 6 cranes. 
Make sense?
RJ
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