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Rpmlaura
@Rpmlaura
April 2020
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Se 2x+3y=5 e 5x+2y=7, quais os valores de x e de y?
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vitoriacarmo
Verified answer
2x+3y=5, x= 5-3y/2, 5( 5-3y)/2 + 2y= 7; 25-15y+4y=14. -11y= -11, y=1. Substitui y p/ achar x, 2x+3.1=5, x=1
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3478elc
2x+3y=5 (-5)
5x+2y=7 ( 2)
-10x - 15y = - 25
10x + 4y = 14
- 11y = - 11 (-1)
11y = 11
y = 1
2x+3y=5 ==> 2x + 3.1 = 5 ==> 2x = 5-3 ==> 2x = 2 ==>
x = 1
1 votes
Thanks 5
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Verified answer
2x+3y=5, x= 5-3y/2, 5( 5-3y)/2 + 2y= 7; 25-15y+4y=14. -11y= -11, y=1. Substitui y p/ achar x, 2x+3.1=5, x=15x+2y=7 ( 2)
-10x - 15y = - 25
10x + 4y = 14
- 11y = - 11 (-1)
11y = 11
y = 1
2x+3y=5 ==> 2x + 3.1 = 5 ==> 2x = 5-3 ==> 2x = 2 ==> x = 1