Question 1179282
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The other tutor solved the problem using a single equation -- not a system of equations, as requested.<br>
To be sure, solving the problem using a single variable is less work... but it's not what the post asked for.<br><pre>
x+y=53   (1) The total number of kicks was 53
3x+1y=89   (2) The point total was 89<br></pre>
With both equations in the form Ax+By=C, I would always use elimination instead of substitution.<br><pre>
      3x+y = 89
    -  x+y = 53
    ------------
      2x   = 36</pre>
I will assume you can finish from there.<br>