Question

efetue os calculos necessários e determine o valor de cada incógnita:

a)5x-7=42
b)3y+5=17-y
c)2(k+3)=k+6
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Answer 1

Resposta:

a) $x=\frac{49}{5}$

b) $y=3$

c) $k=0$

Explicação passo-a-passo:

a) $5x-7=42$

$5x=42+7\\5x=49\\x=\frac{49}{5}$

b) $3y+5=17-y$

$3y+y=17-5\\4y=12\\y=\frac{12}{4} =3$

c) $2(k+3)=k+6$

$2k+6=k+6\\2k-k=6-6\\k=0$