Question

1)obtenha a solução de cada equação
a)9-x=2X
b)8+4X=6X-4
c)3x+1=X+9
d)4x-11=7-2X
e)13X+1=5+X

Answer 1

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

B)8+4x=6x-4
4x-6x=-4-8
-2x=-12(x1)
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=5+x
13x-x=5-1
12x=4
x=4/12
x=0,33

Answer 2

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

b- 8+4x=6x-4
4x-6x= -4-8
-2x= -12 .(-1)
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=5+x
13x-x= 5-1
12x=4 x=4/12 x=0.33