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Ermahgerd Ferncer Ferst
Lv 4
Ermahgerd Ferncer Ferst asked in Science & MathematicsMathematics · 8 years ago

Help with substitution and elimination, please?

I know how to do substitution and elimination when y is solved. However, I have slope-intercept formulas and I'm not sure how to do both with them. The equations are

y= 22.291x + 3519.4

y= 96.484x + 2062.4

Could someone please point me in the right direction? Thank you!

Update:

Thanks so much!

2 Answers

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  • Rameshwar
    Lv 7
    8 years ago
    Favorite Answer

    y = 22.291 x + 3519.4

    y= 96.484 x + 2062.4

    so 96.484 x + 2062. 4= 22.291x + 3519.4

    x[ 96.484 - 22.291 ] = 3519.4- 2062.4

    74.193 x= 1457

    x = 1457000/74193= 19.6379

    y= 22.291 * 19.6379

    y= 437.75 & x= 19.6379 ANSWER

  • just a being
    8 years ago

    y= 22.291x + 3519.4

    y= 96.484x + 2062.4

    y=y,

    so 22.291x + 3519.4=96.484x + 2062.4

    now get x by itself on each side.

    use the x that you get, and put it back into one of the first two equations. you should get the same answer for y when plugging x into both equations

    Source(s): math major
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