Question

determine o conjunto solução das seguinte equações : obs: com calculacoes.
a) 15x+100= -5x




b)3(X-1)=6​

Answer 1

Resposta:

a) 15x+100= -5x

$15x+100=-5x\\15x=-5x-100\\15x+5x=-100\\20x=-100\\x=\frac{-100}{20}\\x= -5$

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b) 3(X-1)=6​

$3\left(X-1\right)=6\\\\\frac{3\left(X-1\right)}{3}=\frac{6}{3}\\\\x-1=2\\x = 2+ 1\\x =3$