Răspuns :
a) 5+2(2x+1)=5(x-1)
5+4x+2=5x-5
7+4x=5x-5
7+5=5x-4x
x=12
b) 15x+5< 10x+25
15x-10x<25-5
5x<20
x<4=>x={3;2;1;0)
5+4x+2=5x-5
7+4x=5x-5
7+5=5x-4x
x=12
b) 15x+5< 10x+25
15x-10x<25-5
5x<20
x<4=>x={3;2;1;0)
a) 5+2(2x+1)=5(x-1)
=>5+4x+2=5x-5
=>7+4x=5x-5
=>7+5=5x-4x
=>x=12
b) 15x+5< 10x+25
=>15x-10x<25-5
=>5x<20
=>x<4=>x={3,2,1,0)
=>5+4x+2=5x-5
=>7+4x=5x-5
=>7+5=5x-4x
=>x=12
b) 15x+5< 10x+25
=>15x-10x<25-5
=>5x<20
=>x<4=>x={3,2,1,0)