Question

Respondas as equacoes a)9-x=2x b)8+4x=6x-4 c)3x+1=x+9 d)4x-11=7-2x e) 13x+1-10x=5+x

Answer 1

a)9-x=2x
9=2x+x
3x=9
x=9/3
x=3

b)8+4x=6x-4
8+4=6x-4x
2x=12
x=12/2
x=6

c)3x+1=x+9
3x-x=9-1
2x=8
x=8/2
x=4

d)4x-11=7-2x
4x+2x=7+11
6x=18
x=18/6
x=3

e)13x+1-10x=5+x
3x-x=5-1
2x=4
x=4/2
x=2

Answer 2

Isso aí é uma baita preguiça de fazer as coisas né.

Lá vai...
a) 4x-6=22  
4x= 22+6
4x= 28
x= 28/4
x= 7

b) 9-x=2x
-x-2x=-9
-3x = -9.(-1)
+3x= +9
x= 9/3
x= 3

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

d) 3x+1=x+9
3x -x = +9 -1
2x= +8
x= 8/2
x= 4

e) 4x-11=7-2x 
4x +2x = 7 +11
6x= 18
x= 18/6
x= 3

f) 13x+1-10x=5+x 
13x -10x -x = 5 -1
13x -11x= 4
2x = 4
x= 4/2
x=2