Question

ayuda lo entrego en unas horas ​

Answer 1

Respuesta:

a) 7x+9=11

7x = 11 - 9

7x = 2

x = 2/7

b) 7(x+3)=21

x + 3 = 21/7

x + 3 = 3

x = 3 - 3

x = 0

c) (x+1) / 7 = 0

x + 1 = 0

x = - 1

d) 5x + 3 - x + 3x = x + 9

4x + 3 + 3x = x + 9

7x + 3 = x + 9

6x = 9 - 3

6x = 6

x = 6/6

x = 1

e) 2x = 2x + 5

2x - 2x = 5

0 = 5 la proposición es falsa

f) 2/3 (x+3) = 0

x + 3 = 0

x = -3

g) 3/5 x + 2/3 = 1/7

3/5 x = 1/7 - 2/3

3/5 x = 3 - 14 /21

3/5 x = -11/21

x = -11/21 * 5/3

x = -55/63