Question

find the value of K if x=2y=1 is a solution of equation 2x +3y=k

Answer 1

since x=2 and y=1 is a solution of the equation, then

2×2+3×1=k,

4+3=k,

then

k=7

Answer 2

Hello!
Here is your answer

Given

$x = 1 \\ y = 1 \div 2$
$2(1) + 3( \frac{1}{2} ) = k$
$2 + \frac{3}{2} = k$
$\frac{7}{2} = k$