Question

Resolva: (lembre-se termos contendo a incógnita no primeiro membro e termos e a icognita no segundo membro
a–3x=5–2x

b)5–3x=2x–1

c)5x–4=10–2x

d)4x+1=2x+1

e)2x+4=19–3x

f)5x+2=3x+6

g)8x–4=3x+11

h)3x+6=6x+5

i)8x+2=6x+4

j)y–0,4=3,5

k)x–0,9=–3

Answer 1

a)
-3x=5–2x
-3x+2x=5
-x=5
x=-5

b)
5–3x=2x–1
-3x-2x=-1-5
-5x=6
x= -6/5

c)
5x–4=10–2x
5x+2x=10+4
7x=14
x=14/7
x=2

d)
4x+1=2x+1
4x-2x=+1-1
2x=0
x=0/2
x= 0

e)
2x+4=19–3x
2x+3x=19-4
5x=15
x=15/5
x=3

f)
5x+2=3x+6 
5x-3x=6-2
2x=4
x=4/2
x=2

g)
8x–4=3x+11
8x-3x=11+4
5x=15
x=15/5
x=3

h)
3x+6=6x+5
3x-6x=5-6
-3x=-1
x=-1/-3
x=1/3

i)
8x+2=6x+4
8x-6x=4-2
2x=2
x=2/2
x=1 

j)
y–0,4=3,5
y=4,5+0,4
y=4,9

k)
x–0,9=–3
x=-3+0,9
x=- 2,1

Answer 2

a– 3x=5–2x ==> 3x + 2x = 5 ==. 5x = 5 ==> x = 1

b)5–3x=2x–1 ==> 3x+2x= 5+1 ==. 5x = 6 ==> x = 6/5

c)5x–4=10–2x => 5x+2x = 10+4 => 7x = 14=> x = 2

d)4x+1=2x+1 => 4x-2x= 1-1=> 2x=0 ==> x=0

e)2x+4=19–3x => 2x+3x=19-4=> 5x=15==> x = 3

f)5x+2=3x+6 => 5x-3x=6-2=> 2x=4=> x = 2

g)8x–4=3x+11 => 8x-3x=11+4=> 5x=15==> x = 3

h)3x+6=6x+5 => 6x-3x= 6-5=> 3x=1=> x = 1/3

i)8x+2=6x+4 => 8x-6x=4-2==> 2x=2 => x = 1

j)y–0,4=3,5 => y = 3,5+0,4 ==> y = 3,9

k)x–0,9=–3 => x = - 3 + 0,9 ==> x = - 2,1