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math

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x+5y= -3
3x-2y= 8
sovle using substituion

  • math - ,

    (1) x + 5y = -3
    (2) 3x - 2y = 8
    substitution method: we first choose one of the equation, and express one of the variables in terms of the other variable,, here let's choose equation (1), and express x in terms of y:
    x + 5y = -3
    x = -3 - 5y
    now, we substitute this to equation (2), and we solve for y:
    3x - 2y = 8
    3(-3 - 5y) - 2y = 8
    -9 - 15y -2y = 8
    -17y = 17
    y = -1
    substituting this back to either equations to get x (let's choose (1)):
    x = -3 - 5y
    x = -3 -5(-1)
    x = -3 + 5
    x = 2

    hope this helps~ :)

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