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Find Substitution 7y+2x=11,3x-y=5

Solution:
Your problem `->` Substitution 7y+2x=11,3x-y=5


`7y+2x=11`

`:.2x+7y=11`

and `3x-y=5`

Suppose,
`2x+7y=11 ->(1)`

and `3x-y=5 ->(2)`

Taking equation `(2)`, we have

`3x-y=5`

`=>y=3x-5 ->(3)`

Putting `y=3x-5` in equation `(1)`, we get

`2x+7y=11`

`=>2x+7(3x-5)=11`

`=>2x+21x-35=11`

`=>23x-35=11`

`=>23x=11+35`

`=>23x=46`

`=>x=2 ->(4)`

Now, Putting `x=2` in equation `(3)`, we get

`y=3x-5`

`=>y=3(2)-5`

`=>y=6-5`

`=>y=1`

`:. y=1" and "x=2`






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