a) 6x + 3y = 3(2x + y)
b) 12a + 9b + 15c = 3(4a + 3b + 5c)
c) 10p + 15r + 20s = 5(2p + 3r + 4s)
d) 8e + 12f + 20g + 24 = 4(2e + 3f + 5g + 6)
e) -6y - 9x - 3 = -3(2y + 3x + 1)
f) 5x - 15y - 20z = 5(x - 3y - 4z)
g) -6u + 12w - 9y + 6 = -3(2u - 4w + 3y - 2)
h) -9 + 18a - 27b + 36c = -9(1 - 2a + 3b - 4c)
i) -x - 1,5y - 7,5z = -0,5(2x + 3y + 15z)
j) -3,5a + 10,5ab - 17,5ac = -3,5a(1 - 3b + 3c)
(-_-(-_-)-_-)
