Solve the following system of equations.
-2x + 5y = 52
x + 4y = 39

a. x = 10, y = -1
b. x = -1, y = 10
c. x = 2, y = 11.2
d. x = 8, y = 7.75

This is a rational expression because the denominator contains a variable. this is a polynomial with 3 terms. this is a rational expression because the denominator contains a variable. this is a polynomial with 4 terms. this is a rational expression because the denominator contains a variable. this is a polynomial with 4 terms. this is a rational expression because the denominator contains a variable. this is a polynomial with 3 terms. this is a rational expression because the denominator contains a variable. this is a polynomial with 5 terms.