Step 1 :Given the system of equations: \[\begin{array}{r} 2 x+3 y=8 \\ x+4 y=9 \end{array}\]
Step 2 :We are asked to determine whether the point (1,2) is a solution to this system.
Step 3 :To do this, we substitute x=1 and y=2 into both equations and check if both equations are satisfied.
Step 4 :For the first equation, substituting x=1 and y=2 gives us \(2(1) + 3(2) = 8\), which is true.
Step 5 :For the second equation, substituting x=1 and y=2 gives us \(1 + 4(2) = 9\), which is also true.
Step 6 :Since both equations are satisfied, we can conclude that (1,2) is a solution to the system of equations.
Step 7 :\(\boxed{\text{Yes, (1,2) is a solution of the system.}}\)