Question

1) Calcule o valor incógnita

a) 2x – 5 = 7

b) 5x + 2 = - 5

c) 2x + 4 = 12

d) 5x – 5 = 10

e) 7x + 7 = 14

f) 3x – 8 = 25

ME AJUDEM POR FAVOOR​

Answer 1

Oie, Td Bom?!

a)

2x - 5 = 7

2x = 7 + 5

2x = 12

x = 12/2

x = 6

b)

5x + 2 = - 5

5x = - 5 - 2

5x = - 7

x = - 7/5

c)

2x + 4 = 12

2x = 12 - 4

2x = 8

x = 8/2

x = 4

d)

5x - 5 = 10

5x = 10 + 5

5x = 15

x = 15/5

x = 3

e)

7x + 7 = 14

7x = 14 - 7

7x = 7

x = 7/7

x = 1

f)

3x - 8 = 25

3x = 25 + 8

3x = 33

x = 33/3

x = 11

Att. Makaveli1996