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Posted by **SEMA , Need Help** on Tuesday, March 9, 2010 at 5:31pm.

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 12:04pmSubstitution method

2X + 5Y = 19 , 3X + 3Y = 15

X = (19-5Y)/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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