Three times the difference between a number and six is eighteen.

Answer 1

for this you simply set X = to a number

 

x = #

 

then you create the formula using numbers and symbols instead of words

 

now remember difference means subtraction and the symbol is -

 

so

 

three times a number would be 3x

 

difference between 3x and 6

 

so we write

 

is seven is the same as = 18

 

so when we put the whole thing together we get

 

3x - 6 = 18

 

3x = 18 + 6

 

3x = 24

 

then simply divide both sides by 3 to get the final answer

 

3x / 3 = 24 / 3

 

the 3s on the left cancel and you get

 

x = 8

 

the answer is 8