Question 1127148
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I'll try to get you pointed in the right direction and assume that you know some algebra and can finish the problem on your own.<br>
You can find an expression for x by eliminating y from the two equations.  To do that, multiply each equation by an appropriate constant so that the coefficients of the y terms in the two equations are the same.  Then subtracting one equation from the other will eliminate y, giving you an equation you can solve for x.<br><pre>
   ax + by = m
   cx + dy = n

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** This line modified in response to reader's question **<br><pre>
Multiply the first equation by d and the second by b; then subtracting the second equation from the first eliminates y, allowing you to solve for x:

   adx + bdy = dm
   bcx + bdy = bn
  ---------------
   (ad-bc)x  = dm-bn

   x = (dm-bn)/(ad-bc)<br></pre>
You COULD plug that expression for x into one of the original equations to find the expression for y; but that would be ugly.  It's easier to use the same procedure as above for solving for y.<br><pre>
   ax + by = m
   cx + dy = n

Multiply the first equation by c and the second by a to make the coefficients of x the same.  Then, similar to above, subtract one equation from the other to eliminate x, allowing you to solve for y.</pre>