219k views
3 votes
Please like please help me ????!!

Please like please help me ????!!-example-1
User Edaemon
by
7.8k points

1 Answer

2 votes

9514 1404 393

Step-by-step explanation:

There are a few basic rules of Algebra. These are broken apart into numerous special cases and each of those is given a name. Here, you're expected to know the names of those "special case" rules.

The basic ideas are ...

  • you can (must) always do the same thing to both sides of the equal sign
  • things that are equal can always be substituted for each other

We divide that first idea into several "properties of equality":

  • addition property of equality: you can add the same to both sides
  • subtraction property of equality: you can subtract the same from both sides
  • multiplication property of equality: you can multiply both sides by the same
  • division property of equality: you can divide both sides by the same

The second idea is used to give you other properties:

  • distributive property: a(b+c) = ab +ac
  • transitive property: a = b & b = c ⇒ a = c
  • substitution property: a = b & a = c ⇒ b = c
  • reflexive property: a = a
  • symmetric property: a = b ⇒ b = a

__

3. The rules used in this solution are ...

  • given
  • distributive property
  • subtraction property of equality (subtract 2x)
  • addition property of equality (add 15)
  • division property of equality (divide by 5)
  • symmetric property

__

4. The rules used in this solution are ...

  • given
  • distributive property
  • addition property of equality (add 4x)
  • subtraction property of equality (subtract 4)
  • division property of equality (divide by 6)
User BC Smith
by
8.5k 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