Question

Por favor es urgente!!
Resuelve las siguientes ecuaciones de 1er grado: a) 5x + 8 = 8x + 2 b) 9 + 9x = 117 – 3x c) 21 – 7x = 41x – 123 d) 500 – 24x = - 4 –3x e) 3x + 100 = 5 (200 – 3x) f) 5 (20 – x) = 4 (2x – 1) g) 7 (x – 18) = 3 ( x – 14) h) 2(x – 2) – 3 ( x – 4) = 3 (16 – 7x)

Answer 1

a) 5x + 8 = 8x + 2

8 - 2=8x - 5x

6 = 3x

x = 2

b) 9 + 9x = 117 – 3x

9x + 3x = 117 - 9

12x = 108

x= 9

c) 21 – 7x = 41x – 123

21 + 123 = 41x + 7x

144 = 48x

x = 3

d) 500 – 24x = - 4 –3x

500 + 4 = 24x - 3x

504 = 21x

x = 24

e) 3x + 100 = 5 (200 – 3x)

3x + 100 =1000 - 15x

3x + 15x = 1000 - 100

18x = 900

x = 50

f) 5 (20 – x) = 4 (2x – 1)

100 - 5x = 8x - 4

100 + 4 = 8x +5x

104 = 13x

x = 8

g) 7 (x – 18) = 3 ( x – 14)

7x - 126 = 3x - 42

7x - 3x = 126 - 42

4x = 84

x = 21

h) 2(x – 2) – 3 ( x – 4) = 3 (16 – 7x)

2x - 4 - 3x + 12 = 48 - 21x

2x - 3x + 21x = 48 - 12 + 4

20x = 40

x = 2

Answer 2

Ya esta. espero que te he ayudado.