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anonymous

  • 5 years ago

the second of two numbers is 3 less than twice the first their sum is 36. find the numbers

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  1. anonymous
    • 5 years ago
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    13 and 23. If you have done algebra, you could use one variable as x and another as y. y=2x-3, x+y=36 so x+2x-3=36 or 3x=39, so x=13 and y =2(13)-3=26

  2. anonymous
    • 5 years ago
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    okay bmt this is a general principal you can use throughout math in your life. you need an equation for every unknown, in order to solve for both unknowns

  3. anonymous
    • 5 years ago
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    you have two unknowns as grodon909 mentioned x and y (the two unknowns)

  4. anonymous
    • 5 years ago
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    one equation you can see is addition of the two unknowns is equal to 36 so x + y = 36

  5. anonymous
    • 5 years ago
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    i know how to set them up i don't know how to do that problem that i said above

  6. anonymous
    • 5 years ago
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    so you NEED one more equation to solve for both x and y that equation is the one gordon909 said y = 2x - 3

  7. anonymous
    • 5 years ago
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    yeah its hard to understand how to set it up properly. you have to just take it step by step and write down each word into the equation

  8. anonymous
    • 5 years ago
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    Usually, what you want to do if you can is solve for one variable/unknown value (for example y was already in such a format) and use it in another equation (ie replace y=(some equation) for y in all cases that you see y).

  9. anonymous
    • 5 years ago
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    sometimes it seems slow and you wanna get it done. but its fast to get it right the first time then to have to redo it. i know that sounds corny but i found that is true everytime

  10. anonymous
    • 5 years ago
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    i give up

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