Question

resolva as seguintes proporções:​

Answer 1

Resposta:

Explicação passo-a-passo:

a)

x--------21

5-------35

35x=5*21

35x=105

x=105/35

x=3

b)

10-------50

7--------x

10x=350

x=350/10

x=35

c)

5x+3----------21

10-------------30

150x+90=-210

150x=-210-90

150x=-300

150x=-300/150

x=-2

d)

1----------x-6

7---------49

7x-42=49

7x=49+42

7x=91

x=91/7

x=13

e)

5--------30

x+4-----54

30x+120=270

30x=270-120

30x=150

x=150/30

x=5

f)

0,9-------- -18

x----------- 27

-18x=24,3

x=24,3/-18

x=-1,35

g)

7x+5---------2x

4------------3/4

21/4x+15/4=8x

21/4x-8x=15/4

11/4x=15/4

x=15/4/11/4

x=15/4*4/11

x=60/44

x=15/11