MatemáticasBásico1 respuestas

1. - (4x - 6 + 5x) + (9 - 5 + 3 - 2x) = 7x - (1 - 6x)2?

1. - (4x - 6 + 5x) + (9 - 5 + 3 - 2x) = 7x - (1 - 6x) 2. 12y = 3(3y - 5) 3. 2(b + 2) - 5(2b - 3) = 3 4. 7 - 6(c - 1) + 3(3 - 4c) = 7 + (7c - 4).

Mejor respuesta

LAXc8ristina
5

- (4x - 6 + 5x) + (9 - 5 + 3 - 2x) = 7x - (1 - 6x) - (9x - 6) + (7 - 2x) = 7x - 1 + 6x - 9x + 6 + 7 - 2x = 7x - 1 + 6x - 11x + 13 = 13x - 1

13x + 11x = 13 + 1

24x = 14

x = 7 / 12

12y = 3(3y - 5)

12y = 9y - 15

12y - 9y = 15

3y = 15

y = 5

2(b + 2) - 5(2b - 3) = 3

2b + 4 - 10b + 15 = 3 - 8b + 19 = 3 - 8b = - 16

b = 2

7 - 6(c - 1) + 3(3 - 4c) = 7 + (7c - 4)

7 - 6c + 6 + 9 - 12c = 7 + 7c - 4

22 - 18c = 3 + 7c

22 - 3 = 18c + 7c

25c = 19

c = 19 / 25.