Question

rezolvati in multimea numerelor ecuatia 2x+2-2<20

Answer 1

2x+2-2<20 +2 cu -2 se simplifica
2x<20
x<10
x={0,1,2,3,4,...,9}

Answer 2

2x+2-2<20
2x+2<20+2
2x+2<22
2x<22-2
2x<20
x<20÷2
x<10
x€{1, 2, 3,........, 9}