6y + 6 = -19 + 8y get y's (variables) to one side or the other
6y - 6y + 6 = -19 + 8y - 6y
0 + 6 = -19 + 2y
6 + 19 = -19 + 19 + 2y next combine numbers (constants)
25 = 2y but we need only 1y or y
25/2 = 2y/2
25/2 = 12.5 = y
check: 6y + 6 = -19 + 8y ; when y = 12.5
6(12.5) + 6 (?=?) -19 + 8(12.5)
81 = 81