Question

resolva as inequações:
a) 8-16>x-16

b) -3(x+15)≤2(2x-3)

c) x/4 -3(x-1)/10 ≤1

Answer 1

a) 8 - 16 > x - 16
8 - 16 + 16 >x
8 > x

b) -3x - 45 ≤ 4x - 6 (aplica-se a distributiva)
-3x - 4x ≤ -6 +45
-7x ≤ 39 (-1)
x ≥ -39/7

c) x/4 - 3(x-1)/10 ≤ 1
x/4 - 3x + 3/10 ≤ 1
MMC( 10;4;1)= 20
5x - 6x+ 6 ≤ 20
-x ≤ 20 - 6
x ≥ -14