Question

I don’t know which one to pick

Answer 1

`\sf{\bold{\green{\underline{\underline{Given}}}}}`

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• w = 7a + 4b

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`\sf{\bold{\green{\underline{\underline{To\:Find}}}}}`

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• Correct option = ??

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`\sf{\bold{\green{\underline{\underline{Solution}}}}}`

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W = 7a + 4b

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• Using equations formulae

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`\sf \implies W - 4b = 7a`

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`\sf \implies (W - 4b)/(7) = a`

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• checking correct option

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Option 1 :

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`\sf \bigg( a = (W - 4b)/(7) \bigg) \\eq \bigg( a = (W - 7b)/(4)\bigg)`

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This option is not correct

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Option 2 :

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`\sf \bigg( a = (W - 4b)/(7) \bigg) \\eq \bigg( a = (W)/(7) - 4b \bigg)`

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This option is not correct

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Option 3 :

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`\sf \bigg( a = (W - 4b)/(7) \bigg) = \bigg( a = (W - 4b)/(7)\bigg)`

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This option is correct

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Option 4 :

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`\sf \bigg( a = (W - 4b)/(7) \bigg) \\eq \bigg( W = (W)/(7) - 28b \bigg)`

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This option is not correct

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`\sf{\bold{\green{\underline{\underline{Answer}}}}}`

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• Correct answer = option C