These are 3 separate equations:
4y - 2 = 6y + 6
subtract 4y from both sides:
-2 = 2y + 6
subtract 6 from both sides:
-8 = 2y
divide both sides by 2:
-8/2 = y y = -4
5a - 5 = 7 + 2a
subtract 2a from both sides:
3a - 5 = 7
add 5 to both sides:
3a = 12
divide both sides by 3:
a = 12/3 = 4
5 + (-5) = 5r + 7
subtract 7 from both sides:
-7 = 5r
divide both sides by 7:
r = -7/5