Question

4(x+1)-2(x+y)=0,5
12x+5(y-3)=-2
Ajutor

Answer 1

4x+4-2x-2y=0,5

12x+5y-15=-2

2x-2y=-3,5   |×6

12x+5y=13

12x-12y=-21

12x+5y=13

Din prima scadem a doua ecuatie

-17y=-34

y=2

12x+10=13

12x=3

$x=\frac{1}{4}$

Answer 2

Răspuns:

4(x+1)-2(x+y)=0,5

12x+5(y-3)=-2

4x-2x-2y+4=0,5

12x+5y-15=-2

2x-2y=-3,5/-6

12x+5y=13

-12x+12y=21

12x+5y=13

0. +17y=34

y=34:17=2

2x-2y=-3,5

2x=2×2-3,5

2x=4-3,5=0,5

x=5/20=1/4