Respuesta :

5x + 9 = 2    |subtract 9 from both sides
5x = -7    |divide both sides by 5
x = -1.4

7 - 6d = 3    |subtract 7 from both sides
-6d = -4      |divide both sides by (-6)
c = 4/6
c = 2/3

1/3y - 2 = 4    |add 2 to both sides
1/3y = 6      |multiply both sides by 3
y = 18