Question

sabendo-se que (x+3,y-4)=(7x,2y+5) determine o valor de x e de y

Answer 1

x + 3 = 7x                          y-4 = 2y + 5
x - 7x = -3                          y -2y = 5 +4
   -6x = -3                                -y = 9
      x = 3/6                                y = -9
      x = 1/2