Question

rezolvati in multimea nr naturale ecuatiile 2(x+3)+17=59 7(x-2)+9=44 125-3(2x-1)=98 17(2x+3)-25=166

Answer 1

2(x+3)+17=59
2x+6+17=59
2x+6=59-17
2x+6=42
2x=42-6
2x=36
x=36:2
x=18
7(x-2)+9=44
7x-14+9=44
7x-14=44-9
7x-14=35
7x=35+14
7x=49
x=49:7
x=7
125-3(2x-1)=98
3(2x-1)=125-98
3(2x-1)=27
(2x-1)=27:3
2x-1=9
2x=9+1
2x=10
x=10:2
x=5