Math, asked by shakeradale12, 1 year ago

​ ​ −3x−9y=18 4x+3y=12 ​

Answers

Answered by preeti9578
0

Answer:

Step-by-step explanation:

4x+3y=12

4x=12-3y

x=12-3y

     4

now by puting the value of x in -3x-9y=18

⇒-3x-9y=18

⇒-3(12-3y)-9y=18

          4

-36-9y-9y=18

       4

-39-9y-36y=18

          4

-39-45y=18

        4

⇒-39-45y=18×4

⇒-39-45y=72

⇒-45y=72+39

⇒-45y=111

⇒-y=111

        45

⇒y=-111

        45

now,

we know that

x=12-3y

      4

⇒x=12-3(-111/45)

          4

⇒x=12-(-111/15)

           4

⇒x=12+111

       4×15

⇒x=123

       60

⇒x=41

      20

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