Angles x, y, and z are angles. if x and y are complementary angles, x and z are supplementary angles, and y and z add up to 190, what is the value of z - x - y, in degrees?

If x and y are complimentary ... x + y = 90

if x and z are supplementary ... x + z = 180

and y + z = 190

x + y = 90 ... x = 90 - y

x + z = 180

90 - y + z = 180

z = 180 - 90 + y

z = 90 + y

y + z = 190

y + 90 + y = 190

2y + 90 = 190

2y = 190 - 90

2y = 100

y = 100/2

y = 50 <===

x = 90 - y

x = 90 - 50

x = 40 <===

z = 90 + y

z = 90 + 50

z = 140 <===

z - x - y = 140 - 40 - 50 = 50 <==