Question

os numeros racionais que satisfazem as inequacoes: A) 4(x-3)>2(x-1)  b)x-2(x-3)=x+5 C)2+5(3x+1)>0

Answer 1

A) 4(x-3)>2(x-1)
4x -12 > 2x -2
4x -2x > -2 +12
2x > +10
x > 10/2
x > 5

b)x-2(x-3)=x+5 
x -2x +6 =x +5
x -2x -x= 5 -6
x -3x = -1
-2x = -1.(-1)
+2x = +1
x= 1/2

C)2+5(3x+1)>0
2 + 15x +5 > 0
15x > -2 -5
15x > -7
x= -7/15