Question

a) 5x - 2. (x - 7) - 6 = 17
b) 8x + 4 - 5. (3 - 2x) = 25
c) 4.(3x - 1) - 2.(4x + 6) = 4
d) -8x + 1+ 6.(3x - 10) = 31​

Answer 1

Resposta:

a) x=3

b) x=2

c) x=5

d) x=9

Explicação passo-a-passo:

a) 5x-2(x-7)-6 =17

5x-(2.x)-(2.(-7))-6=17

5x-2x+14-6=17

3x+8=17

3×=17-8

3x=9

x=9/3

x= 3

b) 8x+4-5(3-2x)=25

8x+4-(5.3)-(5.(-2x))=25

8x+4-15+10x=25

8x+10x=25+11

18x=36

x=36/18

x=2

c) 4(3x-1)-2(4x+6)=4

12x-4-8x-12=4

12x-8x-4-12=4

4x=4+12+4

4x=20

x=20/4

x=5

d) -8x+1+6(3x-10)=31

-8x+1+18x-60=31

-8x+18x=31-1+60

10x=90

x=90/10

x=9