Respuesta :

bcalle
3.50x + 5.50x + 6 = 51
# 10
9x + 6 = 51
Subtract 6 from both sides
9x = 45
Divide both sides by 9
x = 5

#11
5x - 18 - 4x = -36
x -18 = -36
Add 18 to both sides
x = - 18