Question

1) reduza os termos semelhantes:
a) 2a + 3a – 5a + 6a =
b) 3y + 4y – y + y =
c) 7b – 6b + 3b – b =
d) 3am – am + 4am – 6am =
e) 5c + 3c – a + 3a – a =
f) 9g – 7g + 4g – 6g =
g) 6x + x – 8x + 4x – x – 6x =
h) 9k – 6n + 7n – k + 3k =
i) m + 4f + 3m – 2m – 7f =
j) 2x – y – 6x + 6y + 7y - x =
k) 3x + x – 6 + 4x – 5 =
l) 8x + 4x – 2x + y + 3y =
m) –4x + y – x + 6y + 2x =
n) x – 5y – x + 6y + 2x =
o) y + y – 3y + 3y – 3y + 6y =
2) Resolva as equações, encontrando o valor da variável:
a) x + 3 = 10
b) x – 9 = 23
c) x + 12 = 18
d) x + 18 = 45
e) x + 21 = 56
f) x – 8 = 20

Answer 1

Resposta:

A) 6a

B) 7y

C) 3b

D)0

E) 8c + a

F) 0

essas foram as únicas q eu consegui resolver

Answer 2

Resposta:

1)

a) 6a

b) 7y

c) 3b

d) 2am - 2am ou 0am

e) 8c - a

f) 2g - 2g ou 0g

g) -4x

h) 5k + n

i) 2m - 3f

j) 8y

k) 8x - 11

l) 10x + 4y

m) -3x + 7y

n) 2x + y

o) 5y

2)

a) x = 7

b) x = 14

c) x = 6

d) x = 27

e) x = 35

f) x = 28

Explicação passo a passo:

• 1) reduza os termos semelhantes:
• a) 2a + 3a – 5a + 6a =

$2a + 3a -5a + 6a =\\5a - 5a + 6a=\\6a$

• b) 3y + 4y – y + y =

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

• c) 7b – 6b + 3b – b =

$7b-6b + 3b-b =\\\\b + 2b =\\\\3b$

• d) 3am – am + 4am – 6am =

$3am-am + 4am-6am =\\\\2am + 4am - 6am =\\\\2am - 2am\\\\ou\\\\0am$

• e) 5c + 3c – a + 3a – a =

$5c + 3c-a + 3a-a =\\\\8c + 2a -a =\\\\8c -a$

• f) 9g – 7g + 4g – 6g =

$9g-7g + 4g-6g =\\\\2g-2g = \\\\ou \\\\0g$

• g) 6x + x – 8x + 4x – x – 6x =

$6x + x -8x + 4x -x -6x =\\\\7x - 4x - 7x =\\\\7x - 11x = \\\\- 4x$

• h) 9k – 6n + 7n – k + 3k =

$9k-6n + 7n-k + 3k =\\\\9k - k + 3k -6n + 7n =\\\\5k + n$

• i) m + 4f + 3m – 2m – 7f =

$m + 4f + 3m-2m-7f =\\\\m + 3m - 2m - 7f + 4f =\\\\2m - 3f$

• j) 2x – y – 6x + 6y + 7y - x =

$2x -y -6x + 6y + 7y - x =\\\\2x - 6x - x - y + 6y + 7y =\\\\-5y + 13y =\\\\8y$

• k) 3x + x – 6 + 4x – 5 =

$3x + x -6 + 4x -5 =\\\\3x + x + 4x - 5 -6 = \\\\8x - 11$

• l) 8x + 4x – 2x + y + 3y =

$8x + 4x-2x + y + 3y =\\\\12 x - 2x + 4y = \\\\10x + 4y$

• m) –4x + y – x + 6y + 2x =

$-4x + y -x + 6y + 2x =\\\\-4x - x + 2x + 6y + y =\\\\-5x + 2x + 7y =\\\\-3x + 7y$

• n) x – 5y – x + 6y + 2x =

$x -5y -x + 6y + 2x =\\\\x - x + 2x - 5y + 6y = \\\\2x + y$

• o) y + y – 3y + 3y – 3y + 6y =

$y + y-3y + 3y-3y + 6y =\\\\2y - 3y + 6y = \\\\5y$

• 2) Resolva as equações, encontrando o valor da variável:
• a) x + 3 = 10

$x + 3 = 10\\\\x = 10 - 3\\\\x = 7$

• b) x – 9 = 23

$x-9 = 23\\\\x = 23 - 9\\\\x = 14$

• c) x + 12 = 18

$x + 12 = 18\\\\x = 18 - 12\\\\x = 6$

• d) x + 18 = 45

$x + 18 = 45\\\\x = 45 - 18\\\\x = 27$

• e) x + 21 = 56

$x + 21 = 56\\\\x = 56 - 21 \\\\x = 35$

• f) x – 8 = 20

$x - 8 = 20\\\\x = 20 + 8\\\\x = 28$

Espero ter ajudado , se precisar estamos aqui a disposição.              

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