Question 158135
Sol:


Let say x = smaller number
        y = larger number

    x + y = 15 , first equation
    1 - 3x = y , second equation
 
    substitute value of y in the second equation to the first equation to find x

    x + (1 - 3x) = 15
    x + 1 - 3x = 15
            -2x = 14
              x = -7

    Substitute value of x to first equation

     -7 + y = 15
          y = 22

 Ans: x = -7
      y = 22