Question

Determine o valor desconhecido nas proporções a seguir.
a)8/15=x/150




b)(2a-6)/(2,3-a)=4/6




c)(8b+10)/15=b/2



d)(2y+10)/2y=20/16

Answer 1

Explicação passo-a-passo:

a)8/15=x/150

15.x=150.(8)

x=8.(150/15)

x=8.(10)

x=80

b)(2a-6)/(2,3-a)=4/6

4.(2,3-a)=6.(2a-6)

-4a+9,2=12a-36

-4a-12a=-36-9,2

-16a=-45,2

a=-45,2/-16

a=2,825

c)(8b+10)/15=b/2

15.b=2.(8b+10)

15b=16b+20

15b-16b=20

-b=20

b=20/-1

b=-20

d)(2y+10)/2y=20/16

2y.(20)=16.(2y+10)

40y=32y+160

40y-32y=160

8y=160

y=160/8

y=20