Question

rezolvati |N ecuatile a)2x+3>7; b)3x-1<< 4;c)- x+2>-5; 3(1- x)+2>5; 3 x+2>- x+1; -3 x+4<2 x-2; 2( x+1)-3<4; 4( x-2)>3( x+1); 3 x-7+2( x+1)>0;ma ajuta cineva

Answer 1

a)2x+3>7
2x>7-3
2x>4
x>4/2
x>2
x€{3,4,5,6,7,...}

b)3x-1<4
3x<4+1
3x<5
x<5/3
x€{0,1}

c)-x+2>-5
-x>-5-2
-x>-7 |×(-1)
x<7
x€{0,1,2,3,4,5,6}

3(1-x)+2>5
3-3x+2>5
-3x>5-3-2
-3x>0 |:(-3)
x<0
x€∅

3x+2>-x+1
3x+x>1-2
4x>-1
x>-1/4
x€{0,1,2,3,...}

-3x+4<2x-2
-3x-2x<-2-4
-5x<-6 |×(-1)
5x<6
x<6/5
x€{0,1}

2(x+1)-3<4
2x+2-3<4
2x<4-2+3
2x<5
x<5/2
x€{0,1,2}

4(x-2)>3(x+1)
4x-8>3x+3
4x-3x<3+8
x<11
x€{0,1,2,3,...,10}

3x-7+2(x+1)>0
3x-7+2x+2>0
3x+2x>7-2
5x>5
x>5/5
x>1
x€{2,3,4,5,...}