Question

sa se afle numarul natural x:
5x+2(x+9)<32

4(x-12)-2x < sau = x

Answer 1

5x+2(x+9)<32 => 5x+2x+18<32=>7x<32-18=> 7x<14=> x<14/7=> x< 2=>x apartine ( minus infinit;2) acum cealalta 4(x-12)-2x<=x adica 4x-48-2x<=x adica 2x-48<=x adica 2x-x<=48 adica x<= 48 deci x apartine ( minus infinit; 48)

Answer 2

5x+2x+18<32
7x<32-18
x<14:7
x<2
x∈{-∞....1}

4x-48-2x ≤ x
4x-2x-x ≤ 48
x ≤ 48
x∈{ -∞....48}