Question

Stiu. Sunt al naibii de simple dar eu nu ;e prea stiu deci :>
Cum se fac aceste inecuatii? *-*
x + 4 < sau = 7
11-x > 5
18 : x < sau = 2
x : 3 < 4

Dar ecuatile? *-*
2x + 3 = x + 8
2x + 3 = 2 (x+1)
3(x+1) = 3(x+2) - 3 

Answer 1

Uite primele :
1.x={4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20...}
2.x={5,4,3,2,1,0}
3.x={18}
4.{9}