Question

resolva as equaçoes abaixo : por favor e urgente !!! me ajudem

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
h) 8(x-1)=8-4(2x-3)

Answer 1

7 ( x - 5) = 3 ( x + 1)
7x - 35 = 3x + 3
7x - 3x = 3 + 35
4x = 38
x = 38/4 = 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
9 + 8x  - 5x - 10 = 0
3x  - 1  = 0
3x = 1
x = 1/3 ***
f
4 ( x + 5 ) + 3 ( x + 5 ) = 21
4x + 20 + 3x + 15 - 21 = 0
7x  + 14 = 0
x + 2 = 0
x = -2 ***
g
tem erro
h
8 ( x - 1) = 8 - 4 ( 2x - 3)
8x - 8 = 8 - 8x + 12
8x - 8 - 8 + 8x - 12 = 0
16x - 28 = 0
4x - 7 = 0
4x = 7
x = 7/4 ***