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EnricoRiccato
@EnricoRiccato
January 2020
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Resolva os sistemas lineares pelo método de adição
a) {4x+2y=4
{5x+6y=8
b){3x-2y=-12
{2x+y=5
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leozinho172
4x+2y=4 *(-3) -12x-6y = -12 -12*7/4-6y = -12
5x+6y=8 5x+6y = 8 -21- 6y = -12
------------- ----------------- -6y = 9
-7x = -4 y = -9/6
x = 7/4
b) 3x-2y = -12 3x-2y = -12 3(-2/7)-2y = -12
2x+y = 5*(2) 4x+2y = 10 -6/7 - 2y = -12
------------------- ---------------- -20/7y= -12
7x = -2 y = -84/-20
x = -2/7 y= 21/5
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5x+6y=8 5x+6y = 8 -21- 6y = -12
------------- ----------------- -6y = 9
-7x = -4 y = -9/6
x = 7/4
b) 3x-2y = -12 3x-2y = -12 3(-2/7)-2y = -12
2x+y = 5*(2) 4x+2y = 10 -6/7 - 2y = -12
------------------- ---------------- -20/7y= -12
7x = -2 y = -84/-20
x = -2/7 y= 21/5