Posted by SEMA , Need Help on Tuesday, March 9, 2010 at 5:31pm.
Solve for X and Y in the following problems using either substitution or elimination methods.
2X + 5Y = 19 , 3X + 3Y = 15
4X + Y = 22 , 2X + 3Y = 16
12X + Y = 174 , 8X  2Y = 36

MAT 101  PsyDAG, Wednesday, March 10, 2010 at 12:04pm
Substitution method
2X + 5Y = 19 , 3X + 3Y = 15
X = (195Y)/2
Substitute that value for X in the second equation and solve for Y. Put the value of Y into the first equation to solve for X. To check, put both values into the second equation.
Use the same method for the remaining equations.
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