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18-12-2020
Mathematics

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If the first equation is multiplied by 3 and then the equations are added, the resut is
3x+ y=3
x-3y=2

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photomom photomom

18-12-2020

3(3x+y=3)
Distribute
9x +3y=9
Plus this
1x -3y= 2
Equals
10x=11

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