Question

Quanto é?
Equações:
a)-x+4=-2x+1
b)-5x+7-10=-3x+13-12
c) 0,5x-3=-3,5+1,5x
d) -3x+4-2x+1=0
e)-4x-1-3x=-2x+3x-10x
f)-2-x+4=-2x+3x-10x
Inequações:
g)x-4x+1<19
h3x-1-2x>10
i)21x-28-8x-12>6x-10
j)5x-x+2>2x-2

Answer 1

a)-x+4=-2x+1
x=-3

b)-5x+7-10=-3x+13-12
-4=2x
x=-2

c)0,5x-3=-3,5+1,5x
x=0,5

d)-3x-2x+4+1=0
-5x+5=0
x=1

e)-4x-1-3x=-2x+3x-10x
-7x-1=-9x
2x=1
x=1/2 (ou 0,5)

f)-2-x+4=-2x+3x-10x
2-x=-9x
8x=-2
x=-1/4

g)x-4x+1<19
-3x<18
3x>-18
x>-6

h)3x-2x-1>10
x>11

i)21x-8x-28-12>6x-10
21x-8x-6x-40>-10
21x-14x>30
7x>30
x>30/7

j)5x-x+2>2x-2
4x-2x>-2-2
2x>-4
x>-2

Espero ter ajudado