Question

4) Resolva as equações abaixo
a) x + 1 = 9

b) 2a - 4 = 12

c) 17 + y = 13

d) 6x = 84

e) 6t - 19 = 71

f)2x - 4=3

g)5× - 2 = 7 + 6
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Answer 1

Resposta:

4)

a) x+1 = 9

x = 9-1

x = 8

b) 2a-4 = 12

2a = 12+4

2a = 16

a = 16

      2

a = 8

c) 17+y = 13

y = -17+13

y = -4

d) 6x = 84

x = 84

      6

x = 14

e) 6t-19 = 71

6t = 71+19

6t = 90

t = 90

     6

t = 15

f) 2x-4 = 3

2x = 4+3

2x = 7

x = 7

     2

x = 3,5

g) 5x-2 = 7+6

5x = 2+7+6

5x = 15

x = 15

      5

x = 3