Math, asked by navyabhayana, 1 year ago

solve the equation using cross multiplication method
5x+12y=7
X+y=7

Answers

Answered by Misha2003
0
wrong equation


cos if 5x+12y=7
then x+y must be something else other than 7

navyabhayana: no.,..
navyabhayana: x+y=7
Misha2003: then 5x+12y is not equal to 7
navyabhayana: its equal to 7
navyabhayana: and the eq is not wrong
navyabhayana: bcoz
navyabhayana: it setisfy the condition of unique solution
Misha2003: kk
Answered by poddar111204annu
1

Answer:

x = -11  , y = 4

Step-by-step explanation:

      x                             y                         1

1                     7                          1                        1

12                   7                          5                       12

cross  multiply these no.

       x              =               y             =             1          

   7-84                           35-7                        12-5

      x                =                y               =               1        

    -77                               28                                  7

  x = 1              ∴x= -11

  -77   7

  y = 1              ∴ y= 4

  28   7

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