Question

1) Resolvas as equações:
a) x + 5 = 8
b) x - 4 = 3
c) x + 6 = 7
d) x -3 = 7
e) x + 9 = 10
f) x - 109 = 5
g) x - 39 = 79
h) 10 = x + 9
i) 21 = 3x
j) 84 = 6x
K)x
___ = 7
3

i) 2x
__ =4
5

Answer 1

Resposta:

A: 3

B: 6

C: 1

D: 10

E: 1

F: 114

G: 118

H: 1

I: 7

J: 14

Explicação passo a passo:

A: x+5=8

x=8-5

x=3

--------------------------------

B: x-4=3

x=3+5

x=6

--------------------------------

C: x+6=7

x=7-6

x=1

--------------------------------

D: x-3=7

x=7+3

x=10

--------------------------------

E: x+9=10

x=10-9

x=1

--------------------------------

F: x-109=5

x=5+109

x=114

--------------------------------

G: x-39=79

x=79+39

x=118

--------------------------------

H: 10=x+9

x=10-9

x=1

--------------------------------

I: 21=3x

x=21/3=3x/3

7=3x/3

7=x

x=7

--------------------------------

J: 84=6x

84/6=6x/6

14=6x/6

14=x

x=14