Roxanamariagrigore5ask
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Rezolvati: 81:3-2x(a+1)=19 URGEEEENT!

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Andreutsa10ask

81:3-2*(a+1)=19

27-2(a+1)=19

-2(a+1)=19-27

-2(a+1)=-8

2(a+1)=8

a+1=4

a=3

Vodenask

Bună!

[tex]81:3-2*(a+1)=19 <=> 27-2a-2=19 <=> 25-2a=19 => 2a=6 => a=3[/tex]

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