Which of the following expressions equals 7x - y?
I. 7(x - 2y) + 2(7 - 1)y + y
II. 2y + 7(x - 1) + (7 - 3y)
III. 2(7x - y) + (y - 7x)
A) I
B) II
C) III
D) I, II, and III

Question

Quizplus · Accepted Answer

I. Simplifying gives 7x - 14y + 14y - 2y + y = 7x - y.II. Simplifying gives 2y + 7x - 7 + 7 - 3y = 7x - y.III. Simplifying gives 14x - 2y + y - 7x = 7x - y.All three expressions simplify to 7x - y.

Which of the Following Expressions Equals 7x - Y