How do you determine whether or not the point (3,2) are solutions of #2x+3y=12#?
If (3 ,2) is a solution then it must 'satisfy' the equation. That is make it True.
To determine this, substitute x = 3 and y = 2 into the left side of the equation and if the result is 12 then it is a solution.
#"LHS = RHS hence (3,2) is a solution"#