Question

3*(2x+6)+2<86
(4x+3)*5+5<40

Answer 1

6x+18+2<86
6x<86-20
x<66:6
x<11
x∈{0,1,2...10}

20x+15+5<40
20x<40-20
x<20:20
x<1
x∈{ 0}

Answer 2

6x+18+2<86
6x<66
x<11
x∈{0,1,....10}   sau:       x∈(-α,11)
20x+15+5<40
20x<20
x<1
x∈{0}