Question

encuentra el valor de:
5 x + 8 = 38
7x + 3 = 83
12 x + 15 = 75
2x + 1 = x + 4
5x - 10 = 4x + 15
7x + 18 = 5x + 40
10 x + 15 = 5x + 50​

Answer 1

Respuesta:

5x + 8 = 38

5x = 38 - 8

5x = 30

x = 6

7x + 3 = 83

7x = 83 - 3

7x = 80

x = 80/7

12x + 15 = 75

12x = 75 - 15

12x = 60

x = 5

2x + 1 = x + 4

2x - x = 4 - 1

x = 3

5x - 10 = 4x + 15

5x - 4x - 15 + 10

x = 25

7x + 18 = 5x + 40

7x - 5x = 40 - 18

2x = 22

x = 11

10x + 15 = 5x + 50

10x - 5x = 50 - 15

5x = 35

x = 7