Question

Resolva as inequações a) 13x-1<9x+1 b) 3(x-1)-2x>13 c) 9(x-2)-5(x-3)<1

Answer 1

a) 13x-9x<+1+1
4x<2
x<2/4÷2
x<1/2

b) 3x-3-2x>13
3x-2x>13-3
x>10

c) 9x-18-5x+15<1
9x-5x<1+18-15
4x<4
x<4/4
x<1