Explicație pas cu pas:
a) 2x +5=13
2x =8
x=4
b) 6x -15 +14 =2x + 8+7
6x-1 =2x+15
6x=2x+16
4x=16
c)5x-25/10+6x+36/10=2x-1/10+30/10
5x-25+6x+36/10=2x+29/10
11x+11=2x+29/10
9x+11=29/10
x=9
Răspuns:
a)x=4
b)x=4
c)x=9
