Answer:
A.) 2 x minus 4 y = 8. x + y = 7.
Step-by-step explanation:
A.) 2 x minus 4 y = 8. x + y = 7.
2x-4y = 8
x+y=7
This has one solution
B.) 3 x + y = negative 1. 6 x + 2 y = negative 2.
3x+y = -1
Multiply by 2
6x +2y = -2
This is the second equation so it has infinite solutions
C.) 3 x + 3 y = 3. Negative 6 x minus 6 y = 3.
3x+3y =3
Multiply by -2
-6x-6y = -6
The equation is the same but the constant, which means they are parallel lines, they have zero solutions
D.) 3 x minus 2 y = 4. Negative 3 x + 2 y = 4.
3x -2y = 4
Multiply by -1
-3x +2y = -4
The equation is the same but the constant, which means they are parallel lines, they have zero solutions
