Respuesta :

Answer:negative case : 2.5x - 6.8 = -12.9

positive case : 2.5 - 6.8 = 12.9

step 2 : 6.8

step 3 : dividing by 2.5

step 4 : x = 7.88

Step-by-step explanation:

Answer:

a

Step-by-step explanation: