Question

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

Answer 1

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

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.