Решите уравнение: а) 1,5(1+х)=4,5 б) 2(х-7)=1

1.5+1.5х=4.5 1.5х=4.5-1.5 1.5х=3 х=3:1.5 x=1.5

а) 1,5(1+х)=4,5           б) 2(х-7)=11+х=4,5:1,5                    х-7=1:21+х=3                             х-7=0,5х=3-1                              х=0,5+7х=2                                 х=7,5