1) A student uses the substitution method to solve the system of equations below algebraically.2x – y = 53x + 2y = -3Which equation could be used?a. 3x + 2(2x – 5) = -3b. 3x + 2(5 – 2x) = -3c. 3(y + 5/2) + 2y = -3d. 3(5/2 – y) + 2y = -32) Which linear system has been correctly solved for one of the variables from the following system?2x – y = -12x + y = -7

3) Which linear system has the solution (6, 6)?

4) A student is using the elimination method to solve the system of equations below. What is the best first step?3x – y = 52x + 3y = 10a. Multiply the second equation by 3.b. Multiply the first equation by 3.c. Multiply the second equation by 2.d. Multiply the first equation by 2.5) In which line is a mistake first made when solving the following system of equations by elimination for s?2r + 7s = 11r – 9s = -7

Line 1

2r + 7s = 112(r – 9s = -7)

Line 2

2r + 7s = 11 2r – 18s = -14

Line 3

-11s = -3

Line 4

s = 11/3

a. Line 1b. Line 2c. Line 3d. Line 4 6) Find the solution to the system of equations.4c = 3d + 3c = d – 1a. c = 6, d = 7b. c = 3, d = 4c. c = 8, d = 7d. c = 5, d = 4 7) What is the solution to the system of equations.2x – 3y = -9-x + 3y = 6a. (3, 3)b. (-3, 1)c. (-3, 3)d. (1, -3)