Call the unknown number X.
Understand:
I am looking for an unknown number that I'll call x. From the problem:
5 times the number X minus 25= 175
Plan:
I will write an equation to reflect what we know/understand.
5x - 25 = 175
Solve:
5x - 25 = 175
5x = 200
Divide both sides by 5
x = 40
Answer:
The number is 40.
Check:
Let's go back to the original problem written on the slide and check our work.
Twenty five less than five times a number is 175.
25 less than 5*40 is 175.
25 less than 200 is 175.
200-25 =175.
So my answer is correct.
5x - 25 = 175
5*40-25 = 175
200-25 = 175
175 = 175
Again, my answer is correct.