Question

Urgent in 10
Minute

Answer 1

Răspuns:

1.a)

x= 4-y

2(4-y)+y= 7

8- 2y+y=7

-y= -1

y=1

x = 4-y= 4-1= 3

Explicație pas cu pas:

b)x-y=0

x=y

2x+ 3x= 10

5x= 10

x= 2

y=2

Ex.2

a) x= 4-y

2( 4-y)-y= -1

8-2y-y= -1

-3y= -9

y= 3

x= 4-y= 4-3=1