Question

determine o conjunto de soluções das expressões do primeiro grau

a)4×+2=38

b)9×=6×+12

c)5×-1=3×+11

d)2×+8=×+13

e)2 ×-5=×-7
4 3 2

f)4×+2 - 5×- 7=3-×
3 6 2

g)20×-4=5×

​

Answer 1

Resposta:

A) 4x + 2 = 38

4x − 36 = 0

( 4 ) ⋅ x + (− 36 ) = 0

x = − (− 36 )/4

x= − ( 4 ) ⋅ (− 9 )/( 4 )

= 9

B) 9x = 6x + 12

3x − 12 = 0

( 3 ) ⋅ x + (−12 ) = 0

x = − (−12 )/3

x = − ( 3 ) ⋅ ( −4 )/( 3 )

=4

C) 5x − 1 = 3x + 11

2x − 12 = 0

( 2 ) ⋅ x + ( −12 ) = 0

x = − ( − 12 )/2

x = − ( 2 ) ⋅ ( −6 )/( 2 )

= 6

D) 2x + 8 = x + 13

x − 5 = 0

( 1 ) ⋅ x + ( −5 ) = 0

x = − ( − 5)/1

x = 5

E) CONFIRMA PRA MIM SE É ASSIM 2x − 5 = x − 7432?

F) CONFIRMA PRA MIM SE É ASSIM 4 ⋅ 2 − 5 ⋅ − 7 = 3 − ⋅ 362 ?

G) 20x − 4 = 5x

15x − 4 = 0

( 15 ) ⋅ x + ( − 4 ) = 0

x = − ( − 4 )/15

x = 4/15

Explicação passo a passo:

ESPERO TER AJUDADO!