anonymous
  • anonymous
the second of two numbers is 1 more than twice the first. their sum is 25. find the numbers
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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schrodinger
  • schrodinger
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shadowfiend
  • shadowfiend
So what are the two equations we can get from this?
anonymous
  • anonymous
y=x+2+1 ?? x+y+25
anonymous
  • anonymous
i mean X*2+1

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shadowfiend
  • shadowfiend
Correct (and I assume you meant x + y = 25).
anonymous
  • anonymous
yes. lol
shadowfiend
  • shadowfiend
Ok, so how can you solve this system?
anonymous
  • anonymous
x+x*2+1=25
anonymous
  • anonymous
5x=25
shadowfiend
  • shadowfiend
Hm. Where did you get 5x from?
anonymous
  • anonymous
this is where i am having a prob. I get confused on what to add or multiply first
shadowfiend
  • shadowfiend
The easiest way is to group like terms (e.g, terms with x) and then go left to right. For example, in this case they're already grouped: x + 2x + 1 = 25 So we ask ourselves, what is x + 2x?
anonymous
  • anonymous
3x+1=25 ??
shadowfiend
  • shadowfiend
Right. So then what do you do to bring the 1 to the right?
anonymous
  • anonymous
-1
anonymous
  • anonymous
x=8
shadowfiend
  • shadowfiend
Perfect :)
anonymous
  • anonymous
y=17
anonymous
  • anonymous
how do I know if i am solving for x or y?
shadowfiend
  • shadowfiend
Right on.
shadowfiend
  • shadowfiend
You have to solve for both. For the first step, you just have to pick one.
anonymous
  • anonymous
I have a hard time with setting it up. sometimes I do X and sometimes it's y
shadowfiend
  • shadowfiend
As long as you make sure to keep referring to the same variable as x and y throughout, your result should make sense at the end. You can check it by going out to your very first equation and plugging in your answers and making sure that the numbers on both sides are actually equal.
anonymous
  • anonymous
thank you
shadowfiend
  • shadowfiend
No problem.

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