Question

Resolva as inequações U = N
a) 2x + 5 < - 3x +40
b) 6(x - 5) - 2(4x +2) > 100
c) 7x - 9 < 2x + 16

Answer 1

Resolva as inequações U = N
a) 2x + 5 < - 3x +40
2x+3x<40-5

5x<35

x<35/5

x<7

b) 6(x - 5) - 2(4x +2) > 100

6x-30-8x-4>100

6x-8x>100+30+4

-2x>144

x>134/-2

x>-67

{x E N|x>-67}





c) 7x - 9 < 2x + 16
7x-2x<16+9

5x<25

x<25/5

x<5

{x E N|x<5}