Question

2X-5=y-4 e 7X-y=y+3 pfvr​

Answer 1

Resposta:

2x-5=y-4

7x-y=y+3

2x=y+5-4

2x=y+1

x=(y+1)/2

7x=2y +3

7(y+1)/2=2y+3

(7y+7)/2=2y+3. (.2)

7y+7=4y+6

7y-4y=6-7

3y=-1

y=-1/3

x=(y+1)/2

x=(-1/3+1)/2

x=(2/3)/2=

x=2/3 .1/2=2/6=1/3

Resposta:

x= 1/3

y=-1/3