Question

1) Resolva as inequações:
a) 2x-15<-x
b) 6x-5-4x<3
c) -x-10>-2
d) 2x+x-5>19+5x
e) 4-3x>x+6
f) 3x+8<6+5x
g) 3x+4>7-3-1
h) 5x-15<2x+3+5?

Answer 1

a) 6X-5-4X≤3 
    6x-4x≤3+5
    2x≤8
    x≤8/2
    x≤ 4

b) 
2x+4x-5>19+5x
2x+4x-5x>19+5
x>24

c)
4-3x>x+6
-3x-x>6-4
-4x>2 .(-1)
4x<-2
x<-2/4

d)
7(x-1) ≤ 5 -2x
7x-7≤ 5-2x
7x+2x≤5+7
9x≤12
x≤12/9

e)
3(x-2)<5x-8
3x-6<5x-8
3x-5x<-8+6
-2x<-2 .(-1)
2x>2
x>2/2
x>1


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