Question

11) 2X + 3X + 9 = 8 ( 6 – X)
12) 4 (X + 10 ) – 2 ( X – 5 ) = 0
13) 3 ( 2X + 3 ) – 4 ( X – 1 ) = 3
14) 7 ( X – 1 ) – 2 ( X – 5 ) = X – 5
15) 2 ( 3 – X ) = 3 ( X – 4 ) + 15

Answer 1

Explicação passo-a-passo:

11) 5x + 9 = 48 - 8x

5x + 8x = 48 - 9

13x = 39

x = 3

12) 4x + 40 - 2x + 10 = 0

2x = -40 - 10

2x = -50

x = -25

13) 6x + 9 - 4x + 4 = 3

2x = 3 - 9 - 4

2x = 3 - 13

2x = -10

x = -5

14) 7x - 7 - 2x + 10 = x - 5

7x - 2x - x = -5 - 10 + 7

4x = -15 + 7

4x = -8

x = -2

15) 6 - 2x = 3x - 12 + 15

-3x - 2x = -6 - 12 + 15

-5x = -3

x = 3/5