Practica + - page 33

1171
21
Ecuaciones
Ecuaciones de primer grado
.
Resuelve estas ecuaciones de primer grado.
a)
4
x
8
+
6
x
2
+
3
x
=
6
+
7
x
+
2
x
g)
2(
x
3)
+
5(3
x
+
1)
+
4
=
9
x
+
3(3
x
8)
b)
8
x
+
4
7
x
+
9
=
3
3
x
2
h)
3
x
+
5(6
x
4 )
4(3
+
2
x
)
=
3(
3
x
+
4 )
+
10
c)
5
+
3
x
7
+
x
6
x
=
9
+
9
x
15
i)
5(6
2
x
)
4
x
3(
2
x
+
8)
=
8
x
5(1
+
3
x
)
d)
15
x
+
8
4
x
7
x
+
12
=
6
2
x
4
j)
(3
x
+
4 )
+
5(2
x
1)
+
20
=
7(
3
x
+
5)
4(2
5
x
)
e)
4
x
7
+
6
x
+
5
x
5
x
=
2
x
+
12
+
x
+
3
k)
14(
3
+
2
x
)
3(7
x
5)
+
3
=
x
( 4
3
x
)
2
f)
x
5
+
8
x
16
+
6
x
3
x
+
11
=
2
+
10
x
6
l)
7
6(3
x
)
+
9
x
(3
x
+
5)
=
2(5
x
3)
2(
x
5)
4
x
+
6
x
+
3
x
7
x
2
x
=
6
+
8
+
2
4
x
=
16
x
=
16
4
x
=
4
8
x
7
x
+
3
x
=
3
2
4
9
4
x
=
12
x
=
12
4
x
=
3
3
x
+
x
6
x
9
x
=
9
15
5
+
7
11
x
=
22
x
=
22
11
x
=
2
15
x
4
x
7
x
+
2
x
=
6
4
8
12
6
x
=
30
x
=
30
6
x
=
5
4
x
+
6
x
+
5
x
x
2
x
x
=
12
+
3
+
7
+
5
3
x
=
27
x
=
27
3
x
=
9
x
+
8
x
+
6
x
3
x
10
x
=
2
6
+
5
+
16
11
2
x
=
2
x
=
2
2
x
=
1
30
10
x
4
x
+
6
x
24
=
8
x
5
15
x
10
x
4
x
+
6
x
8
x
+
15
x
=
5
30
+
24
x
=
11
x
=
11
3
x
4
+
10
x
5
+
20
=
21
x
+
35
8
+
20
x
3
x
+
10
x
+
21
x
20
x
=
35
8
+
4
+
5
20
8
x
=
16
x
=
16
8
x
=
2
42
+
28
x
21
x
+
15
+
3
=
x
4
+
3
x
2
28
x
21
x
x
3
x
=
4
2
+
42
15
3
3
x
=
18
x
=
18
3
x
=
6
7
18
+
6
x
+
9
x
3
x
5
=
10
x
6
2
x
+
10
6
x
+
9
x
3
x
10
x
+
2
x
=
6
+
10
7
+
18
+
5
4
x
=
20
x
=
20
4
x
=
5
2
x
6
+
15
x
+
5
+
4
=
9
x
+
9
x
24
2
x
+
15
x
9
x
9
x
=
24
+
6
5
4
x
=
27
x
=
27
3
x
+
30
x
20
12
8
x
=
9
x
12
+
10
3
x
+
30
x
8
x
9
x
=
12
+
10
+
20
+
12
10
x
=
30
x
=
30
10
x
=
3
1...,23,24,25,26,27,28,29,30,31,32 34,35,36,37,38,39,40,41,42,43,...44
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