Question 1

If a + b - c = d, and if a - b + c = e, then a =

(A)  (d + e)
(B)  d - e
(C)  2d + e
(D)  d + e
(E)  2(d + e)

To review your response, use your browser's BACK button.

Go to NEXT Question >

The correct response is (A). The quickest way to solve for a here is with the addition-subtraction method. Add corresponding terms together from each equation, then isolate a by dividing both sides of the equation by 2: