Question

Resolva as equações, sendo U=Q:
A_7 (x-5) = 3(x+1)
B_3 (x-2) = 4(-x+3)
C_2 (x+1) - (x-1)=0
D_5(x+1) - 3 (x+2)=0
E_13+4(2x-1)= 5 (x+2)
F_4(x+5)+3 (x+5) =21
G_2(x+5)-3(5-x) =10
8(x-1)=8-4(2x-3)
gente respd pa min pfv

Answer 1

a)
7(x - 5) = 3(x + 1)
7x - 35 = 3x + 3
7x - 3x = 3 + 35
4x = 38
x =  38  (:2) =  19
       4   (:2)      2

x = 19/2
--------------------------------
b)
3(x - 2) = 4(- x + 3)
3x - 6 = - 4x + 12
3x + 4x = 12 + 6
7x = 18
x = 18/7
------------------------------------------
c)
2(x + 1) - (x - 1) = 0
2x + 2 - x + 1 = 0
x + 3 = 0
x = - 3
-----------------------------------
d)
5(x + 1) - 3 (x + 2) = 0 
5x + 5 - 3x - 6 = 0
2x - 1 = 0
2x = 1
x = 1/2
------------------------------------
e)
13 + 4(2x - 1)= 5 (x+2)
13 + 8x - 4 = 5x + 10
8x + 9 = 5x + 10
8x - 5x = 10 - 9
3x = 1
x =  1
       3
---------------------------------------
f)
4(x + 5) + 3 (x + 5) = 21
4x + 20 + 3x + 15 = 21
7x + 35 = 21
7x = 21 - 35
7x = - 14
x = - 14/7
x = - 2
---------------------------------
g)
2(x + 5) - 3(5 - x)  = 10
2x + 10 - 15 + 3x = 10
5x - 5 = 10
5x = 10 + 5
5x = 15
x = 15/5
x = 3
----------------------------------
h)
8(x - 1) = 8 - 4(2x - 3)
8x - 8 = 8 - 8x + 12
8x - 8 = 20 - 8x
8x + 8x = 20 + 8
16x = 28
x = 28  (:4)  =   7
      16  (:4)       4