## overtonka Group Title Solve each system of equations by substitution -3v+3x=12 3v-6x=-21 one year ago one year ago

1. tkhunny Group Title

1) Divide EVERYTHING by 3.

2. skullpatrol Group Title

$$-3v+3x=12$$ $$3v-6x=-21$$ $$\frac{1}{3}(-3v+3x)=\frac{1}{3}(12)$$ $$\frac{1}{3} (3v-6x)=\frac{1}{3}(-21)$$

3. skullpatrol Group Title

Dividing by 3 is the same as multiplying by 1/3 right? @overtonka

4. overtonka Group Title

I really don't know how to do this o.o

5. skullpatrol Group Title

The multiplication property of equality allows you to multiply both sides of an equation by the same nonzero number and get an equivalent equation. Have you heard of this property in class?

6. skullpatrol Group Title

@overtonka

7. overtonka Group Title

No I havent

8. skullpatrol Group Title

Let me give you an example let's say 3=3, now I multiply both sides by 2 what would I get?

9. skullpatrol Group Title

@overtonka

10. abc123! Group Title

11. ryan123345 Group Title

To atleast make the question easier divide everything by 3

12. overtonka Group Title

I tried that

13. ryan123345 Group Title

|dw:1361972385891:dw|

14. skullpatrol Group Title

15. skullpatrol Group Title

Do you want to learn how to do this?

16. ryan123345 Group Title

|dw:1361972609881:dw|

17. ryan123345 Group Title

|dw:1361972653183:dw|

18. skullpatrol Group Title

You must first understand why you do the steps @overtonka

19. ryan123345 Group Title

|dw:1361972684025:dw|

20. skullpatrol Group Title

ryan will give you the answer .. I can show you how to do it ...you choose

21. ryan123345 Group Title

|dw:1361972804662:dw|

22. skullpatrol Group Title

Being interested in how and why things work is what math is all about

23. skullpatrol Group Title

Do you want to learn how to do this?

24. skullpatrol Group Title

Why the steps work?

25. GaLm Group Title

Ryan is showing how to do it, he's not just giving answers

26. ryan123345 Group Title

Thank you.

27. skullpatrol Group Title

Let the learner decide.

28. GaLm Group Title

ok, @overtonka , do you like the way skullpatrol does it or the way Ryan answers

29. Callisto Group Title

"It is better to guide the user to an answer rather than doing all the work yourself. We discourage giving out answers without letting the asker at least take some part in the analysis - the aim of this site is to teach. Please refer to our code of conduct at http://openstudy.com/code-of-conduct for more information. Thank you."

30. ryan123345 Group Title

Okay sorry dude