Y= 5x - 7 -3x - 2y = -12

Solve each system of equations using the substitution method

Give the solution in (x, y) form​

For each polynomial, determine the degree and write the polynomial in descending order. a. –4x^2 – 12 + 11x^4 b. 2x^5 + 14 – 3x^4 + 7x + 3x^3