Question

resolver las siguientes ecuaciones con sus verificaciones
$5.(2x + 3) +4 = 39$

$20 + 4.(x - 2) = x + 21$

$7.(x - 2) = 14 + 3 x$

Answer 1

5.(2x + 3) +4 = 39                  

10x+15+4=39

10x+19=39

10x=20

x=20/10

x=2

5.(2(2) + 3) +4 = 39

5.(4 + 3) +4 = 39

5.(7) +4 = 39

35+4=39

39=39

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20 + 4.(x - 2) = x + 21

20+4x-8=x+21

12+4x=x+21

4x-x=21-12

3x=9

x=9/3

x=3

20 + 4.(3 - 2) = 3 + 21

20+4.(1)=24

20+4=24

24=24

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7.(x - 2) = 14 + 3 x

7x-14=14+3x

7x-3x=14+14

4x=28

x=28/4

x=7

7.( 7- 2) = 14 + 3 (7)

7.(5)=14+21

35=35

Un gracias pues ...... :D