Question

Alguem me ajuda pfvr ???????????​

Answer 1

Explicação passo-a-passo:

1) 2x - x/4 = x/2 + 50

8x-x/4 = x/2+50

7x/4 = x/2+50

7x/4 -x/2= 50

14x-4x/8 = 50

10x/8 = 50

10x = 50 . 8

10x = 400

x = 400/10

x = 40

2) R - F = 3

F = 4/5R

R - F = 3

R - 4/5 . R = 3

5R-4R/5 = 3

R/5 = 3

R = 3 . 5

R = 15

R - F = 3

15 - F = 3

-F = 3-15

-F . (-1) = -12 . (-1)

F = 12

3) x + y = 32

x = 3/5 . y

x + y = 32

3/5 . y + y = 32

3y+5y/5 = 32

8y/5 = 32

8y = 160

y = 160/8

y= 20

x + y = 32

x + 20 = 32

x = 32 - 20

x = 12