Question

What is the solution of the system? Use substitution.
3x + 2y = 7
y = –3x + 11

A. (6, -3)
B. (6, -7)
C. (-4 19/2)
D. (5, -4)

Answer 1

A) 3x + 2y = 7
B) 3x +y =  + 11 multiplying B) by -1
B) -3x -y =  -11 then adding equation A
A) 3x + 2y = 7
y = -4
x = 5
Answer is D

Answer 2

i think it is A.... (6,-3)