Question

3) Resuelve las siguientes ecuaciones yluego verifica: a) 3x + 1 = 7 b) 7x - 8 = 3x + 4 c) 2y +7= y + 15 d) 6x - 3= x + 17 e) 3x + 1 = x - 1 f) 5(2x + 3) = 5x + 8​

Answer 1

Respuesta:

a) 3x + 1 = 7

3x = 6

x = 2

a.1 ) 3(2) + 1 =7

6 + 1 = 7

7 = 7

b) 7x - 8 = 3x + 4

7x - 3x = 4 + 8

4x = 12

x = 3

b.1 ) 7(3) -8 = 3(3) + 4

21 - 8 = 9 + 4

12 = 12

c) 2y +7= y + 15

y = 8

c.1 ) 2(8) +7 = (8) + 15

16 + 7 = 8 + 15

23 = 23

d) 6x - 3= x + 17

5x = 20

x = 4

d.1 ) 6(4) -3 = (4) + 17

24 - 3 = 4 + 17

21 = 21

e) 3x + 1 = x - 1

2x = -2

x = -1

e.1 ) 3(-1) + 1 = (-1) - 1

-3 + 1 = -1 - 1

-2 = -2

f) 5(2x + 3) = 5x + 8​

10x + 15 = 5x + 8

5x = -7

x = - ( 7/5 )

f.1 ) 5( (2* - 7/5) + 3) = 5( -7/5) +8

5( -14/5 + 3) = - 35/5 + 8

-14 + 15 = -7 + 8

1 = 1

Espero haberte ayudado :"D SaludosS