easy math linear equation

This easy math puzzle in a form of linear equations shows two animals (ostrich, llama). Can you find how to solve it and provide answer below?

created by zbynny

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| || |||

| = 1
|| = 2
||| = 3

3x + y = 10
y + x = 4

====

x = 3
y = 1

====

2x + 3y => 2*3 + 3*1 => 6 + 3 => result = 9

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