A) 30x -20 = 10
B) 4- 5x =44
C) 90 =20x -10
D) 50 - 10x -60
E) 2x + 60= 0
F) 12 + 7x = 15
G) 5x + 20 =15
H) 7 = 30x + 20
I) 3x + 20 = -1
J) 7x - 30 = 4
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Soluções para a tarefa
Respondido por
2
A) 30x -20 = 10
30x=10+20
30x=30
x=30/30
x=1
B) 4- 5x =44
-5x=44-4
-5x=40
-x=40/5
-x=8 (-1)
x=-8
C) 90 =20x -10
20x=90+10
20x=100
x=100/20
x=5
D) 50 - 10x -60
se for
50-10x=60
-10x=60-50
-10x=10
x=-10/-10
x=1
E) 2x + 60= 0
2x=-60
x=-60/2
x=-30
F) 12 + 7x = 15
7x=15-12
7x=3
x=3/7
G) 5x + 20 =15
5x=15-20
5x=-5
x=-5/5
x=-1
H) 7 = 30x + 20
30x=7-20
30x=-13
x=-13/30
I) 3x + 20 = -1
3x= -1-20
3x=-21
x=-21/3
x=-7
J) 7x - 30 = 4
7x=4+30
7x=34
x=34/7
Ufa !!!
30x=10+20
30x=30
x=30/30
x=1
B) 4- 5x =44
-5x=44-4
-5x=40
-x=40/5
-x=8 (-1)
x=-8
C) 90 =20x -10
20x=90+10
20x=100
x=100/20
x=5
D) 50 - 10x -60
se for
50-10x=60
-10x=60-50
-10x=10
x=-10/-10
x=1
E) 2x + 60= 0
2x=-60
x=-60/2
x=-30
F) 12 + 7x = 15
7x=15-12
7x=3
x=3/7
G) 5x + 20 =15
5x=15-20
5x=-5
x=-5/5
x=-1
H) 7 = 30x + 20
30x=7-20
30x=-13
x=-13/30
I) 3x + 20 = -1
3x= -1-20
3x=-21
x=-21/3
x=-7
J) 7x - 30 = 4
7x=4+30
7x=34
x=34/7
Ufa !!!
Quaisquer duvidas referentes a resposta em questão estou inteiramente a disposição para esclarecimento.
Respondido por
2
a)
30x - 20 = 10
30x = 30
x = 30/30
x = 1
b)
4 - 5x = 44
5x = 40
x = 8
c)
90 = 20x - 10
-20x = -90 - 10
-20x = -100
20x = 100
x = 100/20
x = 5
d)
50 - 10x - 60 = 0
-10x = 60 - 50
-10x = 10
10x = -10
x = -10/10
x = -1
e)
2x + 60 = 0
2x = -60
x = -30
f)
12 + 7x = 15
7x = 15 - 12
7x = 3
x = 3/7
g)
5x + 20 = 15
5x = 15 - 20
5x = -5
x = -1
h)
7 = 30x + 20
-30x = 13
30x = -13
x = -13/30
i)
3x + 20 = -1
3x = -21
x = -21/3
x = -7
j)
7x - 30 = 4
7x = 34
x = 34/7
30x - 20 = 10
30x = 30
x = 30/30
x = 1
b)
4 - 5x = 44
5x = 40
x = 8
c)
90 = 20x - 10
-20x = -90 - 10
-20x = -100
20x = 100
x = 100/20
x = 5
d)
50 - 10x - 60 = 0
-10x = 60 - 50
-10x = 10
10x = -10
x = -10/10
x = -1
e)
2x + 60 = 0
2x = -60
x = -30
f)
12 + 7x = 15
7x = 15 - 12
7x = 3
x = 3/7
g)
5x + 20 = 15
5x = 15 - 20
5x = -5
x = -1
h)
7 = 30x + 20
-30x = 13
30x = -13
x = -13/30
i)
3x + 20 = -1
3x = -21
x = -21/3
x = -7
j)
7x - 30 = 4
7x = 34
x = 34/7
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