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28-05-2019
Mathematics

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Divide. Assume that no denominator equals zero. a-4/b + 7 divided by a + 4/b + 7

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28-05-2019

Answer:

(a - 4) / (a + 4).

Step-by-step explanation:

(a - 4)/(b + 7) / (a + 4) / (b + 7)

Invert the second fraction and multiply:

= (a - 4)/ (b + 7) * (b + 7) / (a + 4)

= (a - 4) / (a + 4) The (b + 7)'s cancel out.

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