The sum of twice a number and 6 is 4

Question

solving the equation 

Answer 1

"The sum of" means you will add

 

twice a number:  2x

 

The sum of twice a number and 6:  2x + 6

 

is 4: = 4

 

Your equation is:

2x + 6 = 4

 

subtract 6 from both sides

 

2x = 4 - 6

2x = -2

 

divide both sides by 2

 

x = -2/2

x = -1