Question

Resolva :
b)5-3x=2x-1
c)5x-4=10-2x
d)8x+2=6x+4
e)3x+6=6x+5
f)y-0,4=3,5
g)x-0,9=-3
h)x+8=2x
( Urgente )

Answer 1

Olá,

vamos lá,

b)5-3x=2x-1
-3x - 2x = -1 - 5
-5x = -6
x = 6/5

c)5x-4=10-2x

5x + 2x = 10 + 4

7x = 14

x = 14/7

x = 2


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

e)3x+6=6x+5
3x - 6x = 5 - 6
-3x = -1
x = 1/3


f)y-0,4=3,5
y = 3,5 + 0,4
y = 3,9


g)x-0,9=-3
x = - 3 + 0,9
x = -2,1

h)x+8=2x
x - 2x = -8
-x = -8
x = 8

Answer 2

b)3x = 2x - 1; 3x - 2x =-1; x = -1
c) 5x - 4 = 10 - 2x; 5x +2x = 10 = 4; 7x = 14 ; x =2
d) 8x + 2 = 6x + 4; 8x - 6x = 4 - 2 ; 2x = 2 ; x=1
e) 3x + 6 = 6x + 4; 3x - 6x = 5-6; -3x = -1; 3x = 1; x = 1/3
f) y -0,4 = 3,5; y = 3,5 + 0,4; y = 3,9
g) x - 0,9 =  -3; x = 0,9 - 3; x = -2,1
h) x + 8 = 2x; x - 2x = -8; 2x = 8; x = 8/2; x = 4