Question

Exercițiile 3 si 4 va rog maine merg la scoala !!plizz

Answer 1

3. a) x+3≤7
x≤7-3
x≤4
x=4,3,2,1,0
b) x+1<3
x<3-1
x<2
x=0,1
c) x+2>5
x>5-2
x>3
=>x=4,5,6,7,8,9,10
x≤10
d) x+2<2
x<2-2
x<0
x=imposibil
e) x+213<216
x<216-213
x<3
x=0,1,2
f) x+4≤10
x≤10-4
x≤6
x=0,1,2,3,4,5,6
g) x+3≤3
x≤3-3
x≤0
x=imposibil
h) 9>x+7
9-7>x
2>x
x<2
x=0,1

4. a) 4·x≤8
x≤8:4
x≤2
x=0,1,2
b) 5x<20
x<20:5
x<4
x=0,1,2,3
c) 2x<7
x<7:2
x<3,5
x=0,1,2,3
d) 6x>12
x>12:6
x>2=>2 =>2x=3,4,5
x≤5