Answer:
y = 35
x = 21
Step-by-step explanation:
y+75 = 3y+5
75 - 5 = 3y - y
70 = 2y
y = 70/2
y = 35
3x+7 = 5x-35
7 + 35 = 5x - 3x
42 = 2x
x = 42/2
x = 21
check:
(3x+7) + (y+75) + (5x-35) + (3y+5) = 360
(3*21 + 7) + (35 + 75) + (5*21 - 35) + (3*35 + 5) = 360
(63+7) + (110) + (105-35) + (105+5) = 360
70 + 110 + 70 + 110 = 360
