anonymous
  • anonymous
I need help with the steps! solve by elimination; x+10y=-10 8x+5y=-5 please/thanks:)
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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jamiebookeater
  • jamiebookeater
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NotTim
  • NotTim
Rearrange one of them to solve for either x or y, and then sub it into the other equation.
anonymous
  • anonymous
2times (8x+5y=-5) - (x+10y=-10) <--- get x
anonymous
  • anonymous
How about you multiply the bottom equation by -2 so that when you add them, your y variables cancel?

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More answers

NotTim
  • NotTim
So, for example. The top one, rearranged to solve for x is x=-10y-10. Sub that into the bottom equation to get 8(-10y-10)+5y=-5
anonymous
  • anonymous
Thanks guys, that helped!
NotTim
  • NotTim
No Problem, citizen! UP UP AND A BATMAN AWAT
NotTim
  • NotTim
away
Callisto
  • Callisto
@NotTim i think that is substitution, not elimination
NotTim
  • NotTim
OH BOTHER. YOU'RE RIGHT.
NotTim
  • NotTim
BUGGER. How do I do it by elimination, I shan't remember.
anonymous
  • anonymous
ahhh crap im confused now
Callisto
  • Callisto
For elimination, multiply a constant on both sides of a equation so that you can cancel it by adding to / subtracting from the other one. Take the question as an example. x+10y=-10 -(1) 8x+5y=-5 -(2) the easier way is to multiply (2) by 2 and subtract it from (1) that is (1) - (2)x2 (x+10y) - (8x+5y)x2 = (-10) -(-5)x2 you will see that you can cancel the unknown y after expanding it
Callisto
  • Callisto
(x+10y) - (16x + 10y) = (-10) + 10 x + 10y -16x -10y = 0 and solve it..
anonymous
  • anonymous
THANK YOU @Callisto
Callisto
  • Callisto
Do you really understand?
anonymous
  • anonymous
At least this problem yes!
Callisto
  • Callisto
Then try another way by cancelling x for this question
anonymous
  • anonymous
blehhhhhhh:(
Callisto
  • Callisto
i need to make sure you really understand the skill...
anonymous
  • anonymous
:( FINE! but im not gonna like it-___-
anonymous
  • anonymous
i dont get it:O

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