Solve the equation 2x - 3y = 22; 3x + 2y = 7
A
-5
B
-4
C
4
D
5
Verified Correct Answer: B.
Step-by-Step Mathematical Solution
2x - 3y = 22 ---- eqn I
3x + 2y = 7 ---- eqn II
multiply eqn I by 2
4x - 6y = 44 ---- eqn III
multiply eqn II by 3
9x + 6y = 21 ---- eqn IV
Adding eqn III and IV
=> 13x = 65 => x = 5
Substituting 5 for x in eqn II
3x5 + 2y = 7 => 2y = -8
y = -4
Source: Myschool Past Questions Archive (Record #26690)