Question

resuelve las ecuaciones plis

a. x + 3 = 7

b. 9 + x = 12

c. 2x – 5 = 19

d. 3x + 8 = 29

e. 21 + 5x = 86

Answer 1

Respuesta:

Explicación paso a paso:

x + 3 = 7

x = 7 -3

x = 4

9 + x = 12

x = 12 - 9

x = 3

2x - 5 = 19

2x = 19 + 5

2x = 24

x =24 ÷ 2

x = 12

3x + 8 = 29

3x = 29 - 8

3x = 21

x = 21 ÷ 3

x = 7

21 + 5x = 86

5x = 86 - 21

5x = 65

x = 65 ÷ 5

x = 13