Question

5 ejemplos de ecuaciones lineales resueltas

Answer 1

1.

 20 – 7x = 6x – 6

-6x – 7x = -20 -6

– 13 x = -26

x = -26 / -13

         x = 2

2 .

7x+2=10x+5

7x-10x   = 5- 2

-3 x = 3

x = 3/-3

 x = -1

3.-

6x−5=8x+2

6x−8x = 5+2

-2 x = 7

  x = – 7 /2

4.-

4x + 4 + 9x + 18 = 12 (x+2)

4x + 4 + 9x + 18 = 12 x+ 24

4x + 9x – 12 x       = -4 -18 + 24

13 x – 12 x = -22 + 24

 x= 2

5.-

90 + 3x = 180

3x= 90

x= 30

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Answer 2

2x + 2y= 24.

2x + 2(x + 2)= 24.

2x + 2x + 4= 24.

4x + 20.

x= 20/4 = 5.