Question

resuelve los sistemas de ecuaciones aplicando el metodo mas adecuado

1. 1/2x-1/2y=4
x+y=10

2. 1/3x+1/5y=3
1/3x-1/2y=-4

3. 3x+2y=1
x-5/4=x+2y

4. x-2(x+y)=3y-2
1/3x+1/2y=3

5. 6x-5y-7=0
-13x+30y-4=0

6. 0.2x+0.3y+0.2=0
3/2x+5/4y-5/2=0

ayuda es para hoy​

Answer 1

1. x-y=8

x+y=10

2x=18

x=9

y=1

2. 1/3x+1/5y=3

1/3x+1/5y-3=0

5x+3y-45=0

5x+3y=45

1/3x-1/2y=-4

1/3x-1/2y+4=0

2x-3y+24=0

2x-3y=-24

5x+3y=45

2x-3y=-24

x=45/8

2x-3y=-24

2*45/8-3y=-24

Y=47/4