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Posted by **ROCKY** on Monday, August 1, 2011 at 11:49am.

3x+7y=77

-2x+7y=42

- intermediate algebra -
**PsyDAG**, Monday, August 1, 2011 at 12:00pmSubtract equation #2 from equation # 1.

5x = 35

You should be able to take it from here.

- intermediate algebra -
**ROCKY**, Monday, August 1, 2011 at 12:28pmI understand where I should what from where plz help me out. It would really be appreciaeted.

- intermediate algebra -
**PsyDAG**, Monday, August 1, 2011 at 3:27pm3x-(-2x) = 3x+2x = 5x

7y-7y = 0

77-42 = 35

Therefore 5x + 0 = 35 or 5x = 35

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