Could somone actually help me and answer the questions ill give brainliest

Solve for x and y: 217x + 131y = 913; 131x + 217y = 827

Atriangle in the coordinates of (2,3), (-4,5) and (-2,4) it is translated 3 units down. what are it’s new coordinates

Javier bought a painting for $150. each year, the painting's value increases by a factor of 1.15. which expression gives the painting's value after 77 years?