Mathematics

Question

How would u solve this liner system?

y = -3x - 1
4x + 3y = 2
What is x and what is y??

1 Answer

  • We can solve it by substitution: y = - 3 x - 1.
    So the 2nd equation becomes:
    4 x + 3 * ( - 3 x - 1 ) = 2
    4 x - 9 x - 3 = 2
    - 5 x = 2 + 3
    - 5 x = 5
    x = 5 : ( - 5 ) = -  1
    y = - 3 * ( - 1 ) - 1 = 3 - 1 = 2
    Answer:  x = - 1,  y = 2.
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