Question

Simplifique e resolva as equacoes:
a)4x-3-x+ 8=11
b)6.(x-2)=12
c)9+2.(5x-4)=21
d)10x+4(3-2x)-6=8
e)3(5+3x)+5(x-1)=22
f)2(9x-4)-(7+6-5x)3=18
(com conta pfv)

Answer 1

A) 4x-3-x+8=11

3x+5=11
3x=11-5
3x=6
x=2

B) 6(x-2)=12

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

C) 9+2(5x-4)=21

9+10x-8=21
1+10x=21
10x=21-1
10x=20
x=2

D) 10x+4(3-2x)-6=8

10x+12-8x-6=8
2x+6=8
2x=8-6
2x=2
x=1

E) 3(5+3x)+5(x-1)=22

15+9x+5x-5=22
10+14x=22
14x=22-10
14x=12

x= 6 sobre 7

F) 2(9x-4)-(7+6-5x)×3=18

18x-8-(13-5x)×3=18
18x-8+(-13+5x)×3=18
18x-8-39+15x=18
33x-47=18
33x=18+47
33x=65

x=65 sobre 33