Which fractions are equal to 2/3rds? Check all that are true

Scarlet bought three pairs of sunglasses and two shirts for $81 and paula bought one pair of sunglasses and five shirts for $105 what is the cost of one pair of sunglasses and one shirt?

Express in the simplest form: (x^2+9x+14/x^2-49) / (3x+6/x^2+x-56)

Which value of m will create a system of parallel lines with no solution? y = mx - 6 8x - 4y = 12