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LilsEvans
@LilsEvans
December 2019
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Me ajudem com essas duas?
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exalunosp
E
MÉTODO ADIÇÃO
3x - 4y = -11 ( 1 )
4x + 4y = 2
--------------------------
7X // = - 9
X = - 9/7 *** SUBSTITUINDO EM ( 1)
3 ( -9/7) - 4Y = - 11
-27/7 - 4Y/1 = -11/1
MMC= 7
- 27 - 28Y = - 77
-28Y = -77 + 27
-28Y = - 50
28Y = 50
Y = 50/28 =25/14 ***
f
5x + 5y = 5 ( vezes 2 )
-2x + 4y = 0 ( vezes 5 ) ( 2 )
--------------------------
10x + 10y = 10
-10x + 20y = 0
---------------------------
// 30y = 10
y = 10/30 = 1/3 ***
substituindo na ( 2)
-2x + 4y = 0
-2x + 4 ( 1/3) = 0
-2x/1 + 4/3 = 0
mmc = 3
-6x + 4 = 0
-6x = -4
6x = 4
x = 4/6 = 2/3 ****
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MÉTODO ADIÇÃO
3x - 4y = -11 ( 1 )
4x + 4y = 2
--------------------------
7X // = - 9
X = - 9/7 *** SUBSTITUINDO EM ( 1)
3 ( -9/7) - 4Y = - 11
-27/7 - 4Y/1 = -11/1
MMC= 7
- 27 - 28Y = - 77
-28Y = -77 + 27
-28Y = - 50
28Y = 50
Y = 50/28 =25/14 ***
f
5x + 5y = 5 ( vezes 2 )
-2x + 4y = 0 ( vezes 5 ) ( 2 )
--------------------------
10x + 10y = 10
-10x + 20y = 0
---------------------------
// 30y = 10
y = 10/30 = 1/3 ***
substituindo na ( 2)
-2x + 4y = 0
-2x + 4 ( 1/3) = 0
-2x/1 + 4/3 = 0
mmc = 3
-6x + 4 = 0
-6x = -4
6x = 4
x = 4/6 = 2/3 ****