Question

agora simplifique e resolva as equações

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

Answer 1

Olá!!!

a) 5x - 2 ( x - 7 ) - 6 = 17
5x - 2x - 14 - 6 = 17
5x - 2x = 17 + 14 + 6
7x = 37
x = 37 / 7

S = { 37 / 7 }

b) 8x + 4 - 5 ( 3 - 2x ) = 25
8x + 4 - 15 - 10x = 25
8x - 10x = 25 - 4 + 15
- 2x = 36
x = 36 / - 2
x = - 18

S = { - 18 }

c) ( 3x-1 ) 4 - 2 ( 4x+6 ) = 4
12x - 4 - 8x + 12 = 4
12x - 8x = 4 + 4
4x = 8
x = 8 / 4
x = 2

S = { 2 }

d) - ( 8x-1 ) + 6 ( 3x-10 ) = 31
- 8x - 1 + 18x - 60 = 31
- 8x + 18x = 31 + 1 + 60
10x = 92
x = 92/10 simpl. por (:2) = 46/5

S = { 46/6 }

Espero ter ajudado....

Answer 2

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

5x-2x+14-6=17

5x-2x=17-14+6

3x=9

X=3

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

8x+4-15+10x=25

8x+10x=25-4+15

18x=36

X=36/18

X=2

C) (3x-1).4-2.(4x+6)=4

12x-4-8x=4+4+12

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