Solving a system of linear equations using substitution

Algebra
Tutor: None Selected Time limit: 1 Day

Use substitution to solve the system

4x - 5y = 29

3x - 8 = y

Answer

x =

y =

Nov 14th, 2015

hello

4x - 5y = 29

3x - 8 = y


take second equation,3x - 8 = y

                                        y = 3x - 8

substitute  y = 3x - 8 in 4x - 5y = 29

                                     4x - 5 ( 3x - 8 ) = 29

                                      4x - 15x+40 = 29

                                          -11x = 29-40

                                         -11x = -11

                                             x =1......................ANSWER

substitute x =1 in y=3x-8

                           y=3*1-8

                          y =-5.........................ANSWER


ANSWER IS

x =1

y =-5



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Nov 14th, 2015

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