question 1Solve the system of equations and choose the correct answer from the list of options. d + e = 15 −d + e = −5 Label the ordered pair as (d, e). A (0, 0) B (10, −5) C (5, 10)D (10, 5)question2A set of equations is given below: Equation S: y = x + 9 Equation T: y = 2x + 1 Which of the following steps can be used to find the solution to the set of equations?A x = 2x + 1B x + 9 = 2xC x + 1 = 2x + 9D x + 9 = 2x + 1Question 3A set of equations is given below: Equation C: y = 6x + 9 Equation D: y = 6x + 2 Which of the following options is true about the solution to the given set of equations?A One solutionB No solutionC Two solutionsD Infinite solutionsquestion 4Solve the system of equations and choose the correct answer from the list of options. 2x + y = −4 y = 3x + 2A negative 6 over five comma negative 8 over 5B negative 8 over 5 comma negative 6 over 5C negative 5 over 6 comma negative 11 over 5D negative 11 over 5 comma negative 6 over 5question 5A system of equations is given below: y = –2x + 1 6x + 2y = 22 Which of the following steps could be used to solve by substitution?A 6x + 2(−2x + 1) = 22B −2x + 1 = 6x + 2y C 6(−2x + 1) + 2y = 22 D 6(y = −2x + 1)