" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
X=5Y/7+34/7
SOL:
-9(5Y/7+34/7)-7y=10
-45Y/7-306/7-7Y=10
-306/7-10=45Y/7+7Y
-376/7=94/7Y
-376/7 SOBRE 94/7= Y
-2632/658=Y
-4=Y
7X-5(-4)=34
7X+20=34
7X=34-20
7X=14
X=14/7
X=2
SALU2
1) 7x - 5y = 34
2) - 9x - 7y = 10
Despejo x en 1
7x - 5y = 34
7x = 34 + 5y
x = (34 + 5y)/7
Sustituyo x en 2
- 9x - 7y = 10
- 9 (34 + 5y)/7 - 7y = 10
- 9 (5y + 34)- 49y
--------------------------- = 10
7
- 94y - 306 = 10 (7)
- 94y = 70 + 306
- 94y = 376
y = 376/-94
y = - 4
El valor de y lo sustituyo en el despeje de x
x = (34 + 5y)/7
x = (34 + 5 (- 4)/7
x = (34 - 20)/7
x = 14/7
x = 2
Solución :
x = 2
y = - 4