what is One more than the difference between 18 and seven times a number is -9 as an equation

Question

I dont understand how to turn this word problem into a word problem

Answer 1

Set it up in steps:

 

(i) The difference between 18 and seven times a number:

 

18 - 7x

 

(ii)  One more than the difference between 18 and seven times a number:

 

Add 1 to the expression from step (i) and get

 

1 + (18 - 7x)

 

(iii)  One more than the difference between 18 and seven times a number is -9:

 

Set expression from step (ii) equal to -9 and get

 

1 + (18 - 7x) = -9

 

You can simplify and solve for x.