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Potterhead
Lv 4
Potterhead asked in Education & ReferenceHomework Help · 8 years ago

Mathematics: Linear Systems?

Solve the linear system:

3x + 2y = 28

5x - 3y = 15

The answer is:

x = 6

y = 5

Please show your work, thank you so much!

2 Answers

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  • Ray
    Lv 7
    8 years ago
    Favorite Answer

    3x+2y=28

    5x-3y=15

    3*eq1: 9x+6y=84

    2*eq2: 10x-6y=30

    Add them: 19x=114

    Solve for x: x=114/19= 6

    Plug 6 in eq1: 3(6)+2y=28

    2y=28-18=10

    y=5

    Solution(x,y)= (6,5)

  • MojoMaj
    Lv 6
    8 years ago

    Have you tried the methodology listed in the websites: www.purplemath.com or www.mathisfun.com ???

    Source(s): http://www.bing.com/videos/search?q=two+equations+...
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