If `x=-1,\ y=2` is a solution of the equation `3x+4y=k ,` find the value of `k`

Explanation

Here, Equation is `3x+4y=k`
Now, put `x=-1 and y=2` in the given equation
`3(-1)+4(2)=k`
`-3+8=k`
`k=5`
`therefore` value of k is 5.