Solve each system by substitution.

(-3x + y = 20)
(-5x - 7y = -10)

Question

bagofmud bagofmud

18-01-2017
Mathematics

contestada

Solve each system by substitution.

(-3x + y = 20)
(-5x - 7y = -10)

Respuesta :

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Selen13 Selen13 · Answer 1 · 2017-01-18T02:42:48+01:00

15x+5y=100                    original equation
                                                 -5x-7(4.375)=-10
                                                        -5x-30.625=-10
                                                          -5x=20.625 15x+21y=30                                             y=4.125

           -16=70

                  x=4.375

Solve each system by substitution. (-3x + y = 20) (-5x - 7y = -10)

Respuesta :

Otras preguntas

Solve each system by substitution.

(-3x + y = 20)
(-5x - 7y = -10)