Ответы и объяснения

2013-04-25T14:48:22+04:00

4,5x-4.5-2.3x-4.6=2.1x

4.5x-2.3x-2.1x=4.5+4.6

0.1x=9.1

x=9.1:0.1

x=91

2013-04-25T23:50:33+04:00

4.5*(x-1)-2.3*(x+2)=2.1x
4.5x-4.5-2.3*(x+2)-2.1x=0

4.5x-4.5-(2.3x+4.6)-2.1x=0

4.5x-4.5-2.3x-4.6-2.1x=0

2.2x-4.5-4.6-2.1x=0

2.2x-9.1-2.1x=0

0.1x-9.1=0

x=9.1/0.1

x=91