Math question help please

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

Which statements about the system are true? check all that apply. y =1/3 x – 4 3y – x = –7 the system has one solution. the system consists of parallel lines. both lines have the same slope. both lines have the same y–intercept. the equations represent the same line. the lines intersect.

How can writing phrases as algebraic expressions you solve problems?