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Aliun [14]
4 years ago
12

​

Mathematics
1 answer:
hjlf4 years ago
4 0
4x - 3y + 20 = 0....4x - 3y = -21

4x - 3y = -21.....multiply by -2
5x - 6y = -25
----------------
-8x + 6y = 42 (result of multiplying by -2)
5x - 6y = -25
---------------add
-3x = 17
x = -17/3

this system of equations has 1 solution
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Answer:

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Step-by-step explanation:

The computation of the number of grams of zinc contain is shown below:

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