Answer:
<em>(1, - 2) </em>
Step-by-step explanation:
2x - y = 4
3x + y = 1
A = = 2(1) - 3( - 1) =2 + 3 = 5
=
= 4(1) - 1(- 1) = 4 + 1 = 5
=
= 2(1) - 4(3) = 2 - 12 = - 10
<em>x </em>= =<em> 1</em>
<em>y </em>= = <em>- 2</em>
<em>(1, - 2)</em>
Answer:
B, D
Step-by-step explanation:
Solve all equations:
A.
This is false equality, so this equation has no solutions.
B.
This equality is true for all values of x, so this equation has infinitely many solutions.
C.
This equation has the unique solution.
D.
This equality is true for all values of x, so this equation has infinitely many solutions.
E.
This equation has the unique solution.