I dont know this and i dont see anyone solving for a like the question asks

Theamoeba asked Aug 8, 2022

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Theamoeba asked Aug 8, 2022

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20 votes

Answer:

2. a = Ah/w - b

Explanation:

A = (a + b)/2 · h

2A = (a + b)h

2A/h = a + b

2A/h - b = a

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