What is the percent of discount to the nearest percent on a pair of jeans that are $39.99

Solve by any method (graphing, substitution or linear combination)y = x - 82x + 3y = 1a) (2, -6)b) (5, -3)c) (4, -4)d) (0, -8)i figured it out. the answer is (5, -3)

What does x = in this equation x+3+2x=x+5

Plzzz answer both questions and i will give you 100 points