Question

Encontre o valor da equação 2x+5+x+7=18? * a) 2 b) 0 c)1 d)-1

Answer 1

Resposta ↓

Alternativa A é a correta = 2

Explicação passo-a-passo:

2x + 5 + x + 7 = 18

2x + x = 18 - 7 - 5

3x = 18 - 12

3x = 6

x = 6 / 3

x = 2

Answer 2

$\Box \ \ \boxed{\begin{array}{l}\sf 2x+5+x+7=18 \ ??? \end{array}}$

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$\boxed{\begin{array}{lr}2x+5+x+7=18\\3x=18-7-5\\3x=6\\x=\dfrac{6}{3}\\\\ \huge\boxed{\sf x=2 \ \ \checkmark}\end{array}}$

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Resposta é;

x=2

alternativa

a) 2

prova real

$\boxed{\begin{array}{lr}2x+5+x+7=18\\4+5+2+7=18\\9+9=18\\18=18\\=18-18\\\huge\boxed{\sf R=0 \ \checkmark }\end{array}}$

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