what should the solution for the x,y value be and which method was used and why

Answer: Your Equation: 20x+5=T
Other Company Equation: 10]x+20=T
Solution: ([x-value],[y-value])
I used [pick one: elimination, graphing, substitution] because [reason why]

It seems like the equation for the other company was input incorrectly as "10]x+20=T". Please provide the correct equation for further assistance.