Question

1-Resolva:
A) (2+x) (3)=-2x
B) (7+3)-(2-4)=
C) 2/3+6/5=
D)1/2-2/3+4/5=
E)2/3 x 7/2=
F) 1/2 ÷ 3/5=

2-Resolva :
A) 2x-3x=4+3=
B) x-8=-3x+3=
C) 4x=6x+2x-1=
D) 2(x+1)=10
E) - 10x+3=2(2x-4)=
F) (2+x) (3)= - 2x
G)2/x+1=1/x

Answer 1

1-
a)(2+x)(3) = -2x
6 + 3x = -2x
5x = -6
x = -6/5

b) (7 + 3) - (2 - 4)
10 -(-2)
10+2
12

c) 2/3 + 6/5
(10+18)/15
28/15

d)1/2 - 2/3 +4/5
(3 - 4)/6 + 4/5
-1/6 + 4/5
(-5 + 6)/30
1/30

e)2/3 x 7/2
14/6

f) 1/2 ÷ 3/5
5/6

2-
a) 2x-3x = 4+3
-x = 7
x = -7

b) x - 8 = 3x + 3
x - 3x = 3 + 8
-2x = 11
x = -11/2

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

d) 2(x + 1) = 2(2x - 4)
2x + 2 = 4x - 8
10 = 2x
x = 10/2
x = 5

e) -10x + 3 = 2(2x - 4)
-10x + 3 = 4x - 8
11 = 14x
x = 11/14

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

g) 2/x + 1 = 1/x
(2+x)/x = 1/z
2+x = 1
x = -1