Question

resolva as equações
a)3×–7=2x+5

b)7x+8=4x–10

c)2x–4–8=4

e)3x=x+1+7

f)360+36x=30x

g)2x+5–5x=–1

h)5+6x=5x+2.

i)x+2x–1–3=x

j)–3x+10=2x+8+1 ​

Answer 1

Resposta:

a)x=12

b)x=-6

c)x=8

e)x=4

f)x=-60

g)2=x

h)x=-3

i)x=2

j)1/5 ou 0,2=x

Answer 2

Resposta:

a) x = 12

b) x = -6

c) x = 2

e) x = 4

f) x = 60

g) x = 2

h) x = -3

i) x = 2

j) x = 1

Explicação passo a passo:

$a)\\3x-7=2x+5\\\\3x-2x=5+7\\\\x=12\\\\\\\\b)\\7x+8=4x-10\\\\7x-4x=-10-8\\\\3x=-18\\\\x=\frac{-18}{3}\\\\x=-6\\\\\\\\c)\\2x-4-8=4\\\\2x-12=4\\\\2x=4+12\\\\2x=16\\\\x=\frac{16}{8}\\\\x=2$

$d)\\3x=x+1+7\\\\3x=x+8\\\\3x-x=8\\\\2x=8\\\\x=\frac{8}{2}\\\\x=4\\\\\\\\e)\\360+36x=30x\\\\36x-30x=-360\\\\-6x=-360\\\\x=\frac{-360}{-6}\\\\x=60\\\\\\\\f)\\2x+5-5x=-1\\\\-3x+5=-1\\\\-3x=-1-5\\\\-3x=-6\\\\x=\frac{-6}{-3}\\\\x=2$

$g)\\5+6x=5x+2\\\\6x-5x=2-5\\\\x=-3\\\\\\\\h)\\x+2x-1-3=x\\\\3x-4=x\\\\3x-x=4\\\\2x=4\\\\x=\frac{4}{2} \\\\x=2\\\\\\\\i)\\-3x+10=2x+8+1\\\\-3x-2x=8+1-10\\\\-x=-1\\\\x=1$

Espero ter ajudado , se precisar estamos aqui a disposição.                          

(Se realmente merecermos , marque como melhor resposta para nos ajudar) ❤️