18y + 18 = 36 + 12y + 12
18y + 18 = 48 + 12y
18y - 12y = 48 - 18
6y = 30
y = 5
17c - 34 - 36 = 19 + 12c - 24
17c - 70 = 19 + 12c - 24
17c - 12c = 19 - 24 + 70
5c = 65
c = 13
18y + 18 = 36 + 12y + 12
18y + 18 = 48 + 12y
18y - 12y = 48 - 18
6y = 30
y = 5
17(c-2) - 36 = 19 + (c-2)1217c - 34 - 36 = 19 + 12c - 24
17c - 70 = 19 + 12c - 24
17c - 12c = 19 - 24 + 70
5c = 65
c = 13