Question

resolva as questões abaixo.

a)x+5=8-2x=
b)x-4=3=
c)x+6=5+2x=
d)x-3= -7=
e)x+9= -1+20-4x=
f)x+28=11+3x-10+x=
g)x-109=5=
h)x-39=-79=
I)10=X+9=
j)15=X+20=​

Answer 1

RESPOSTA :

a) x + 5 = 8 - 2x

x + 2x = 8 - 5

3x = 3

x = 3/3

x = 1

b) x - 4 = 3

x = 3 + 4

x = 7

c) x + 6 = 5 + 2x

x - 2x = 5 - 6

- x = - 1 . (-1)

x = 1

d) x - 3 = -7

x = -7 + 3

x = - 4

e) x + 9 = -1 + 20 - 4x

x + 4x = -1 + 20 - 9

5x = 19 - 9

5x = 10

x = 10/5

x = 2

f) x + 28 = 11 + 3x - 10 + x

x - 3x - x = 11 - 10 - 28

-3x = -27

x = -27/3

x = 9

g) x - 109 = 5

x = 5 + 109

x = 114

h) x - 39 = -79

x = -79 + 39

x = -40

I) 10 = X + 9

-x = 9 - 10

-x = -1 . (-1)

x = 1

j) 15 = X + 20

-x = 20 - 15

-x = 5 . (-1)

x = -5