Which of the following equations has a solution of -2
A. 7+x=5
B.3x=-12
C.-6-x=20
D.8=3-x
To determine which equation has a solution of -2, we can substitute -2 for the variable in each equation and simplify.
A. 7 + x = 5
Substituting -2 for x, we get:
7 + (-2) = 5
5 = 5
B. 3x = -12
Substituting -2 for x, we get:
3(-2) = -12
-6 = -12 (not true)
C. -6 - x = 20
Substituting -2 for x, we get:
-6 - (-2) = 20
-6 + 2 = 20
-4 = 20 (not true)
D. 8 = 3 - x
Substituting -2 for x, we get:
8 = 3 - (-2)
8 = 3 + 2
8 = 5 (not true)
Therefore, none of the given equations have a solution of -2.