Which of these expressions is equivalent to 8 × (a 1)? a a × (8 1) b 8 (a × 1) c (8 × a) 1 d 8 × a 8 × 1

8 x (a + 1) = (8 x a) + (8 x 1)

Combine like terms and then continue to solve. Like 4x + 3x is 7x then 12 - 5 is 7 so you have 7x + 7 = 9x - 25 the you subtract 7x from both sides and get 2x and now you have 2x + 7  = -25 and you subtract 7 from both sides now and get -32 so now its 2x = -32 and get -16.