METODO DE IGUALACION
Juan Antonio Salas Sánchez.
1
4x+3y=205
3x+3y=145
145-2(35)
3
145-2(35)
3
145-70
30
75
3
X=25
X=250-3y =
145-2y
4
3
3(205-3y)=580-8y
-9y+8y=580-516
-1=35
Y=35
-1
Y=35
2
416 personas y mujeres 250
X+Y=416
2X-Y=250
416-X =-250+ 2X
416-X-2X=250
-3X=-250-416
-3X =-666
-3
-3
X=222
Y=416-X
Y=-250
416-X=250+2x
416+-X=-250+2X
X+Y=416
222+Y=416
Y=416-222
Y=194
3
X+Y=1200
5X+2Y=3000
X=1200-Y X=3000-2Y/5
5(1200-Y)+2Y=3000
6000-5Y+2Y=3000
-3Y=3000-6000
-3Y/-3=-3000/-3
Y=1000
X+Y=1200
X+1000=1200-1000
X=200
X=200
Y=1000
4
X+3Y=54
2X+4Y=84
X=54-3Y X=84-4Y/2
2(54-3Y)+4Y=84
108-6Y+4Y=84
-2Y=84-108
-2Y/-2Y=-24/-2
Y=12
X+3Y=54
X+3(12)=54
X+36=54
X=54-36
X=18
5
·
yo compre en el mercado 1 kg
de sandia y 10kg de elites y en total le cobraron $40.00, Luis compro 5 kg de
sandia y 7 kg de elote qué precio tiene cada cosa ?
5x + 7y = 71
X + 10y = 40
y=71 – 5x/ 7 y= 40-x /10
10(71- 5x) = 7 (40 - x) 40- 10/10
710- 50x = 28- 7x
-50 + 7 = 710 – 280 y = 3
-43 = 430
X = 10
6
5x + 7y = 71
X + 10y = 40
y=71 – 5x/ 7 y= 40-x /10
10(71- 5x) = 7 (40 - x) 40- 10/10
710- 50x = 28- 7x
-50 + 7 = 710 – 280 y = 3
-43 = 430
X = 10
6
bretas tamaño profesional y libretas forma italiana
4 x+3y=205
3 x+2y= 145
X=205-3y
4
X=145-2y
3
2 05+3y = 145+2y
4 3
3 (205+3y) = 4(145+2y)
615+6y = 580+8y
6y-8y = 580-615
-2y = -35
Y = -35/-2
Y = 17.5
X=145-2(17.5)
3
X=145-35
3
X=110
3
X= 36.6