Question

Resolva as seguintes equações

A) X+ 7=3

B) -x=3x+5

C) 2x+7x-10=4x+3-2x

D) 3·(x+1)=8

Answer 1

Resolvendo:

a)

$x+7=3\\x=3-7\\x=-4$

S = {-4}

b)

$-x=3x+5\\-x-3x=5\\-4x=5\\x=-\frac{5}{4}$

S = {-5/4}

c)

$2x+7x-10=4x+3-2x\\9x-10=2x+3\\9x-2x=3+10\\7x=13\\x=\frac{13}{7}$

S = {13/7}

d)

$3(x+1)=8\\3x+3=8\\3x=8-3\\3x=5\\x=\frac{5}{3}$

S = {5/3}

Espero ter ajudado!

Desculpe qualquer erro.