Household voltage

Question

Normal household voltage is 110 volts. However, it is not uncommon for actual voltage to differ from normal voltage by @ most 5 volts. Express this situation as an inequality involving an absolute value. Use x as the actual voltage solve for x

 

|x-100|-5=0

Answer 1

| x - 110 | = 5

 

First solution:

 

x - 110 = 5

 

x = 115

 

Second solution:

 

-(x - 110) = 5

 

x - 110 = -5

 

x = 105