Question

Fie ecuatia x-y+1=0
A) Daca x=0,atunci y=?
B) Daca y=-1,atunci x=?
C) Daca x=a,atunci y=?

Answer 1

A) y = 1

B) x = -2

C) a - y + 1 = 0 => y = a + 1

Answer 2

Explicație pas cu pas:

x-y+1=0

a) x=0

=>

0-y+1=0

-y+1=0

-y=-1

y=1

b) y=-1

x-1+1=0

x=0

c) x=a

=>

a-y+1=0

a=y-1

y=a+1