Answer:
x=8
Step-by-step explanation:
Set 40 + y = 90
y=50
y = 6x + 2
6x + 2 = 50
6x = 48
48/6 = x
8
(6x + 2) + 40 = 90 because the entire angle is a right angle, therefore the whole angle is 90
subtract 40 from each side: 6x + 2 = 50
now subtract 2 from each side: 6x = 48
now divide 6 from each side: x = 8
