September 2018 0 20 Report

Rozwiąż równanie:

{x-y=5
{x+2y=-1

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Odpowiedzi

Blasphemer
Logomocja

{x=5+y
{5+y+2y=-1

{x=5+y
{3y=-6

{x=5+y
{y=-2

 

{x=5-2
{y=-2

 

{x=3
{y=-2

 

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Logomocja

\left\{{{x-y=5}\atop{x+2y=-1}}\right

\left\{{{x=5+y}\atop{(5+y)+2y=-1}}\right

\left\{{{x=5+y}\atop{5+3y=-1}}\right

\left\{{{x=5+y}\atop{3y=-1-5}}\right

\left\{{{x=5+y}\atop{3y=-6}||/3}\right

\left\{{{x=5+y}\atop{y=-2}}\right



x=5+(-2)

x=5-2

x=3

\left\{{{x=3}\atop{y=-2}}\right

Spr.

x-y=5

3-(-2)=5

3+2=5

L=P

x+2y=-1

3+2\cdot (-2)=-1

3+(-4)=-1

3-4=-1

L=P.


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