Odpowiedzi

2010-02-04T18:11:25+01:00
A) [(-2x)*5]-14=61
-10x+15-14=61
-10x+1=61 /-1
-10x=60 /: -10
x= -6

b) [(-2x)*5]-14=-74
-10x+15-14=-74
-10x+1=-74 /-1
-10x=-75 /: -10
x = 7,5
5 3 5