Question

Find x and y in terms of a.
x + y = 0
x + ay = 7
(a ≠1)

Answer 1

Answer: y=7/(a-1)

x=7/(1-a)

Step-by-step explanation:

x + y = 0

x + ay = 7

y-ay=0-7

y(1-a)=-7

y=-7/(1-a)

y=7/(a-1)

x + y = 0

x+7/(a-1)=0

x=-7/(a-1)

x=7/(1-a)