Question

1a) 2x-5>0
b)3-2x≥x-12
c)3x-4>0
d)-x+5≥0
e)3-4x>x-7


2a)1≤x+1<5
b)2x<x+43x
c)-8x+16≤-10x+18<2x-6
d)3x+15≥-6x+21>-8x+25

por favor me ajudem

Answer 1

a)2x > 5
x > 5/2

b) 3-2x >= x-12
-x >= -12-3
x <= 15

c) 3x -4 > 0
3x > 4
x > 4/3

d) -x + 5 >= 0
-x >= -5
x <= 5

e) 3-4x > x -7
-4x > x -7-3
-5x > -10
5x < 10
x <2

2a) 1 <= x+1<5
1-1 <= x < 5-1
0 <= x < 4

b) 2x < x + 43x
2x < 44x
2x -2x < 44x -2x
0 < 42x
0 < x

Posto o resto depois :)