Question

Resolva em R as equações 1 grau a seguir :

a) 4 x - 9 = 23

b) 7 x - 33 = - 12

c) 33 = 5 - 4x

d) 2 x = 14

e) 7 x = - 21

f) 4 x = - 12

g) 9 x - 2 = 4 x + 18

h) 2 x - 10 + 7 x + 10 = 180​

Answer 1

Resposta:

4x-9= 23

4x = 23 +9

4x = 32

x= 32/4

x= 8

7x-33 = -12

7x = -12 +33

7x = 21

7x = 21/7

x= 3

33-5 = -4c

+4x = -33 +5

+4x =28

x = 28/4

x= 7

2x=14

x< 14/2

x=7

7x= -21

x= 21/7

x =3

4x=-12

x=12/4

x<3

9x-3 =4x+18.

9x -4 x = +18 +3

5x= 21

x= 21/5

2x-10+7x+10=180

2x +7x =180 -10+10

9x= 180

x= 180/9

x= 20