Question

Rezolvati in multimea numerelor naturale ecuatiile :

8(x-1)+15=55

10(x-2)+17 =67
2+3(x+1)=10

Answer 1

1. 8x-8=55-15=8x-8=40=8x=40+8=8x=48=x=48÷8=6
2. 10*-20=50=10*=50+20=10*=70=*=7
3. 3*+3=10+2=3*+3=12=3*=12-3=3*=9=3