Question

a) - (y+4) = -10 + 9(y-1)

b) 5 (x-4) = -3 + 9(x - 1)

c) 4x - 7 = 2x - 8

d)3x - x = 8​

Answer 1

Resposta:

a) - (y+4) = -10 + 9(y-1)

-y - 4 = -10 + 9y - 9

-y - 9y = -19 + 4

-10y = -15. (-1)

10y = 15

y = 15/10

y = 1,5

b) 5 (x-4) = -3 + 9(x - 1)

5x - 20 = -3 + 9x - 9

5x - 9x = -12 + 20

-4x = 8. (-1)

4x = -8

x = -8/4

x = -2

c) 4x - 7 = 2x - 8

4x - 2x = -8 + 7

2x = -1

x = -½

d)3x - x = 8

2x = 8

x = 8/2

x = 4

Espero ter ajudado. Abs