Question

Resolva as equações
D)3+2x=2
E)9x-3=0
F)2x+9=3x
G)5-x=1
H)2x=-4+x
I)20+x=20
J)8x-3=10x
K)15=3x-12
L)10x-9-4x=0

Answer 1

D) 2x=2-3
2x=-1
x=-1/2

E)9x-3=0
9x=3
x=3/9
x=1/3

F)2x+9=3x
9=3x-2x
9=1x
x=9

G)5-x=1
5=1+x
5-1=x
x=4

H)2x=-4+x
2x-x=-4
x=-4

I)20+x=20
x=20-20
x=0

J)8x-3=10x
3=10x-8x
3=2x
x=3/2

K)15=3x-12
15+12=3x
3x=27
x=27/3
x=9

L)10x-9-4x=0
10x-4x=9
6x=9
x=9/6
x=3/2

Answer 2

D). 3+2x=2 2x=2-3 X=-1/2