Question

ME AJUDEM POR FAVOR!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Answer 1

a)  5x+9=2x+3      y=2(-2)+3             b)10x+18=4x+6     y=4(-2)+6

         3x=-6            y=-4+3                            6x=-12        y=-8+6             

           x=-2            y=-1                                  x=-2          y=-2

S={(-2,-1)}                                                             S={(-2,-2)}

c)-2x-3=-5x-9        y=-2(-2)-3              d) vou fazer pela adição

       3x=-6              y=4-3                      -y=-3x-4,5      

         x=-2               y=1                          y=7,5x+13,5     y=7,5(-2) +13,5

S{(-2,1)}                                            fica   0=4,5x+9       y= -15+13,5

                                                                      4,5x=-9         y=1,5

                                                                          x=-2                 S={(-2,1,5)}