2x+2y=2. -4x+4y=12 can someone explain this step by step

2x+ 2y= 2; -4x+4y= 12

X + y= 1 ; -x+ y= 3 ==> y= 3+ x

X+ (3+x) =1

2x = 1-3= -2 ==> x= -1

Y= 2

step-by-step explanation:

for the free

80° is the measure of gh

step-by-step explanation:

circle f is congruent to circle j

we have two circle with center f and j.

both circles are congruent. the radius of the circle would be equal.

see the attachment for the circle.

we are given ∠efd ≅ ∠gjh

therefore, arc (ed) = arc (gh)     (∴ circle f is congruent to circle j)

but ∠dfe=80°=arc (ed)

therefore, arc (gh) = 80°

thus, 80° is the measure of gh