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Choose which quantity is the subject - Paper 2

Read the information, then answer the questions. An adult may read the instructions aloud. Show your working where asked.

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Formula: T = 8a + 5b. Make a the subject by first subtracting the whole 5b term, then dividing by 8. For a numerical check use b = 3 and T = 31. Also compare the general formula T = ka + mb, where dividing by k needs k not equal to zero.

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