anonymous
  • anonymous
Solve each system of equations by substitution -3v+3x=12 3v-6x=-21
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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schrodinger
  • schrodinger
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tkhunny
  • tkhunny
1) Divide EVERYTHING by 3.
skullpatrol
  • skullpatrol
$$-3v+3x=12$$ $$3v-6x=-21$$ $$\frac{1}{3}(-3v+3x)=\frac{1}{3}(12)$$ $$ \frac{1}{3} (3v-6x)=\frac{1}{3}(-21)$$
skullpatrol
  • skullpatrol
Dividing by 3 is the same as multiplying by 1/3 right? @overtonka

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anonymous
  • anonymous
I really don't know how to do this o.o
skullpatrol
  • skullpatrol
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?
skullpatrol
  • skullpatrol
@overtonka
anonymous
  • anonymous
No I havent
skullpatrol
  • skullpatrol
Let me give you an example let's say 3=3, now I multiply both sides by 2 what would I get?
skullpatrol
  • skullpatrol
@overtonka
anonymous
  • anonymous
do u want the answer or how to get the answer
ryan123345
  • ryan123345
To atleast make the question easier divide everything by 3
anonymous
  • anonymous
I tried that
ryan123345
  • ryan123345
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skullpatrol
  • skullpatrol
@overtonka Does giving you the answer help you learn?
skullpatrol
  • skullpatrol
Do you want to learn how to do this?
ryan123345
  • ryan123345
|dw:1361972609881:dw|
ryan123345
  • ryan123345
|dw:1361972653183:dw|
skullpatrol
  • skullpatrol
You must first understand why you do the steps @overtonka
ryan123345
  • ryan123345
|dw:1361972684025:dw|
skullpatrol
  • skullpatrol
ryan will give you the answer .. I can show you how to do it ...you choose
ryan123345
  • ryan123345
|dw:1361972804662:dw|
skullpatrol
  • skullpatrol
Being interested in how and why things work is what math is all about
skullpatrol
  • skullpatrol
Do you want to learn how to do this?
skullpatrol
  • skullpatrol
Why the steps work?
anonymous
  • anonymous
Ryan is showing how to do it, he's not just giving answers
ryan123345
  • ryan123345
Thank you.
skullpatrol
  • skullpatrol
Let the learner decide.
anonymous
  • anonymous
ok, @overtonka , do you like the way skullpatrol does it or the way Ryan answers
Callisto
  • Callisto
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ryan123345
  • ryan123345
Okay sorry dude

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