Question

Pomocy abc !!!!!!!!! pilne na teraz

Answer 1

A) -2(x+4) >= ((3x-6)/2
-2x-8 >= 1.5x - 3
-2x -1.5 x >= -3 +8
-3.5x >= 5 /-3.5
x <= 5/3.5
x <= 5*2/7
x<=1 3/7
b)
2x - 7 +(x+2)/2 > 7x
2x -7 + 0.5x + 1 > 7x
2.5x -6 > 7x
-6 > 7x - 2.5x
-6 > 4.5 x
x< -6/4.5
x<-6*2/9
x< - 1 1/3

c) 2.5x -5 <= 5(1/2x -4)
2.5x -5 <= 2.5 x -4/5
2.5 x - 2.5 x <= -4/5 +5
0 <= 1/5 - rownanie sprzeczne