Question

Resolva as equações sendo a icógnita um número racional

a) 7a+=2a+10

b) 4x+16= -2x+4

c) 9y - 4=2 - 6y

d) a+2a= -3a+18

e) 8x - 6 = 7x + 5

f) 2x +4x - 6 = 6 (x - 1)

Answer 1

Resposta:

a) 7a+=2a+10

7a - 2a = 10

5a = 10

a= 10/5

a= 2

b) 4x+16= -2x+4

4x + 2x = -16 +4

6x = -12

x = -12/6

x= -2

c) 9y - 4=2 - 6y

9y + 6y = 2 + 4

15y = 6

y= 6/15

d) a+2a= -3a+18

a + 2a + 3a = 18

6a = 18

a = 18/6

a= 3

e) 8x - 6 = 7x + 5

8x - 7x = 5 + 6

x = 11

f) 2x +4x - 6 = 6 (x - 1)

2x +4x - 6 = 6x - 6

2x + 4x = 6x

6x = 6x