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Daca 8-5x=-x+20, atunci x egal cu...

Răspuns :

Bsorin578

8-5x=x+20

-5x-x=20-8

-6 x=12

x= -2

JYOLO

1)8-5x=-x+20

-5x+x+8=-x+x+20

-5x+x+8=20

-5x+x+8-8=20-8

-5x+x=20-8

-5x+1x=20-8

(-5+1)x=20-8

-4x=12

-4x:(-4)=12:(-4)

x=12:(-4)

x=-12:4

x=-3

2)8-5x=x+20

-5x-x+8=x-x+20

-5x-x+8=20

-5x-x+8-8=20-8

-5x-x=20-8

-5x-1x=20-8

(-5-1)x=20-8

-6x=12

-6x:(-6)=12:(-6)

x=12:(-6)

x=-12:6

x=-2

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