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Marillams
@Marillams
November 2019
2
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2x-18>4x-28=
(Me ajudem, please)
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marialyce1
Verified answer
2x-18>4x-28
2x-18+28>4x-28+28
2x+10>4x
2x-4x+10>4x-4x
-2x+10>0
-2x+10-10>-10
-2x>-10
Multiplica por -1
2x<10
2x/2<10/2
x<5
R: Para qualquer valor de x menor que 5 essa desigualdade é verdadeira.
0 votes
Thanks 1
valterbl
Vamos lá.
2x - 18 > 4x - 28
2x - 4x > -28 + 18
-2x > - 10 (- 1)
2x < 10
x < 10/2
x < 5
Bons estudos
0 votes
Thanks 2
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Verified answer
2x-18>4x-282x-18+28>4x-28+28
2x+10>4x
2x-4x+10>4x-4x
-2x+10>0
-2x+10-10>-10
-2x>-10
Multiplica por -1
2x<10
2x/2<10/2
x<5
R: Para qualquer valor de x menor que 5 essa desigualdade é verdadeira.
2x - 18 > 4x - 28
2x - 4x > -28 + 18
-2x > - 10 (- 1)
2x < 10
x < 10/2
x < 5
Bons estudos