179k views
4 votes
20 points! i need somebody to explain this to me for D + 4 < 7.

i get the answer 3 but if it's 3 then at the end when im checking my work it ends up being D + 4 < 7
3 + 4 < 7
7 < 7 which is saying 7 is less than 7 ? what am i doing wrong

20 points! i need somebody to explain this to me for D + 4 < 7. i get the answer-example-1
User BumbleGee
by
8.1k points

1 Answer

5 votes

Assuming there is no line under the "less than" sign, this means D + 4 < 7 solves to D < 3, which is what I'm assuming you got. This is found by subtracting 4 from both sides.

Writing D < 3 means D is some number less than 3. A solution is just that. You cannot pick 3 itself because 3 is not less than 3. But you can pick something like 2 since it is less than 3.

D+4 < 7

2+4 < 7 ... replace D with 2

6 < 7 ... true

Or D could be 1

D+4 < 7

1+4 < 7

5 < 7 .... true

and so on.

User Bardiir
by
8.3k points

No related questions found

Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.

9.4m questions

12.2m answers

Categories