Question

1 Resolva as seguintes Proposições

a) x = 21
5 35

b) 10 = 50
7 x

c) 1 = x - 6
7 49

d) 5x+3 = - 21
10 30

e) 5 = 30
x+4 = 54

f) 0,9 = -18
x 27

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Answer 1

Resposta:

a) 3

b) 35

c) 13

d) -2

e) 5

f ) 1,35

Explicação passo-a-passo:

a) x/5 = 21/35

35x = 105

x = 105/35 = 3

b) 10/7 = 50/x

10x = 350

x = 350/10= 35

c) 1/7 = x-6/49

7(x+6) = 49

7x-42 = 49

7x = 49+42

x = 91/7 = 13

d) 5x+3/10 = -21/30

30(5x+3) = -210

150x+90 = -210

150x = -210-90

x= -300/150 = -2

e) 5/x+4 = 30/54

30x+120 = 270

30x = 270-120

x = 150/30 = 5

f ) 0,9/x = -18/27

-18x = 24,3

x = 24,3/-18 = 1,35