Question

Calcule o valor de x nas equaçoes, sendo u = z
a) 5x=4x - 9
b) 2x+6= x
c) 3x + 8 = 2x -3
d) 7x + 9 - 2x =20 + 4x +1

Answer 1

a) 5x=4x-9
   5x-4x=-9
   x=-9
b) 2x+6=x
   2x-x=-6
  x=-6
c) 3x+8=2x-3
    3x-2x=-3-8
    x=-11
d) 7x+9-2x=20+4x+1
    7x-2x-4x=20+1-9
    7x-6x=20-8
    x=12