Please Help ASAP I’m confused

Which ordered pair is a solution to the system of linear equations? 2x + 3y= 6 –3x + 5y = 10

Write an inequality and solve each problem.for exercises 11 and 12, interpret the solution.

Lin is writing an equation to model the proportional relationship between y, the total cost in dollars of downloading videos from a website, and x, the number of videos downloaded. she knows that the total cost to download 3 videos was $12. her work to find the equation is shown below. joylin’s work step 1 k= 3/12= 0.25 step 2 y= 0.25x where did joylin make her first error?