Mathematics

Question

solve for x and y: 3x/5+y/2=13/10 and .5y+0.04x=2.42

1 Answer

  • 3 x / 5 + y / 2 = 13/10   / * 10
    0.5 y + 0.04 x = 2.42    / * 100
    ---------------------------------------
    6 x + 5 y = 13  / * ( - 10 )
    4 x + 50 y = 242
    -------------------------------
    - 60 x - 50 y = - 130
    +
        4 x + 50 y  =  242
    -----------------------------
    - 56 x = 112
    x = 112 : ( - 56 ) = - 2
    -12 + 5 y = 13
    5 y = 25
    y = 25 : 5 = 5
    Answer:
    x = -2,  y = 5.
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