y=2x+4 x-y=-1 Which ordered pair (x,y) satisfies the system of equations shown above?
Correct answer: B. ( -3, -2)
- A. ( -2, -3)
- B. ( -3, -2)
- C. ( -1, 2)
- D. ( -2,0)
Explanation
Using simultaneous linear equation substituting x and y in the 1st equation Option A) Y - 2x =4 -3 - 2(- 2) =4 - 3 + 4=4 Option A is hence incorrect as it does not satisfy the equations. Option B) substituting x and y in the 1st equation Y - 2x=4 -2 - 2 ( -3)=4 -2 +6= 4 4 =4 Substituting option B in 2nd equation -3 - (-2)= - 1 - 3 +2= - 1 -1 = - 1 B is the answer Option C) Substituting option C in 2nd equation 2 - (-1) =- 1 As 3 is not equal to -1 this option is wrong Option D) Substituting option D in 2nd equation -2 - 0 =-1 - 2 is not equal to -1 This option is also incorrect
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