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Substiution method: y + 9 = 1/5x and
45 - 3y = -15x

Please show work thank you very much.

Substiution Method Y 9 15x And 45 3y 15x Please Show Work Thank You Very Much class=

Sagot :

ainulkarim
y+9=1/5x menjadi y= 1/5x -9
sesudah ini sibtusika n dalam persamaan 4x - 5y = -15x
                                                             4x -5(1/5x-9)= -15 x
                                                             4x + x+45=-15x
                                                             5x +45 = -15x                                                                                                            45=-20x 
                                                              x=-45/20
                                                              x= -9/4
 
 y+9 =1/5x
   y      = 1/5(-9/4)-9
      y     = -189/20
  (-9/4,-189/20)
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