Question

ATIVIDADE 1 (Parte 2)
m)3x = 15
o)3r=-9
p)2x - 2 = 12 - 5x
q)3x – 13 = 8
n)2x = 10
r)4x-9 = 23
v)7x = -21"
s)7x- 33 = -12
t)33+x=5 – 3.
u)2x = 14
w)4x=-12
x)35x=-105​

Answer 1

Resposta:

m) x = 5  o) r = -3  p) x = 2  q) x = 7  n) x = 5  r) x = 8  v) x = -3  s) x = 3  t) x = -31  u) x = 7  w) x = -3  x) x = -3

Resolução:

m) 3x = 15

x = 15/3

x = 5

o) 3r = -9

r = -9/3

r = -3

p) 2x - 2 = 12 - 5x

2x + 5x = 12 + 2

7x = 14

x = 14/7

x  = 2

q) 3x – 13 = 8

3x = 8 + 13

x = 21/3

x = 7

n) 2x = 10

x = 10/2

x = 5

r) 4x - 9 = 23

4x = 23 + 9

x = 32/4

x = 8

v) 7x = -21

x = -21/7

x = -3

s) 7x- 33 = -12

7x = -12 + 33

x = 21/7

x = 3

t) 33 + x = 5 – 3.

x = 2 - 33

x = -31

u) 2x = 14

x = 14/2

x = 7

w) 4x = -12

x = -12/4

x = -3

x) 35x = -105​

x = -105/35

x = -3