Answer:
The answer to your question is Equations 1, 2 and 5 are equivalent
Step-by-step explanation:
1.- Equation 1
2 + x = 5 x = 5 - 2 x = 3
2.- Equation 2
x + 1 = 4 x = 4 - 1 x = 3
3.- Equation 3
9 + x = 6 x = 6 - 9 x = -3
4.- Equation 4
x + (-4) = 7 x - 4 = 7 x = 7 + 4 x = 11
5.- Equation 5
-5 + x = -2 x = 5 - 2 x = 3
