Sagot :
Explications étape par étape:
4 x +2= 2x+8
==>4x -2x=8-2
==>2x=6
==>x=6/2
==>x=3
x/2= 5
==>x=5*2
==>x=10
8=5x -2
==>8+2=5x
==>10=5x
==>x=10/5
==>x=2
4x +2 < 10
==>4x < 10-2
==>4x < 8
==>x < 8/4
==> x < 2
Explications étape par étape:
4 x +2= 2x+8
==>4x -2x=8-2
==>2x=6
==>x=6/2
==>x=3
x/2= 5
==>x=5*2
==>x=10
8=5x -2
==>8+2=5x
==>10=5x
==>x=10/5
==>x=2
4x +2 < 10
==>4x < 10-2
==>4x < 8
==>x < 8/4
==> x < 2