1.   Use the substitution method to solve m - n = 7 and 3m + 2n = 6.
    A. (4, -3) B. (-3, -10)
    C. (-5, 2) D.
    Hint

  2.   Use substitution to solve the system of equations given below.
    A. (-10, -12) B. infinitely many solutions
    C. no solution D. (-12, -10)
    Hint

  3.   Use substitution to solve the system of equations given below.
    A. infinitely many solutions B. no solution
    C. (-5, 5) D.
    Hint

  4.   Use substitution to solve the system of equations.
5x + 5y = -30
2x - y = 15
    A. (21, 27) B. no solution
    C. infinitely many solutions D. (3, -9)
    Hint

  5.   Use substitution to solve the system of equations given by x – 4y = 24 and 3x – 4y = 16.
    A. (-4, 7) B. (10, -3.5)
    C. (10, 3.5) D. (-4, -7)
    Hint