Homework Help Forum: substitution method

Posted by j.hargrove on Wednesday, November 4, 2009 at 7:37pm.

y=x-7 2x+y=8

• substitution method - Rain, Wednesday, November 4, 2009 at 7:39pm

  2x+(x-7)=8 you have to substite the equation for y into the problem

  
  

• substitution method - Xander, Wednesday, November 4, 2009 at 8:12pm

  It does not really matter so long as what used to read as having two variable letters gets knocked down to one variable letter. You can either describe x in terms of y or y in terms of x. Plug and chug, then solve with algebraic maneuvers.

  
  

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