(1)设每月应还贷x元,共付款12×10=120次,则有
x[1+(1+0.005)+(1+0.005)2+…+(1+0.005)119]=700000(1+0.005)120,
所以x[
1×(1−(1+0.005)120)
1−(1+0.005)]=700000(1+0.005)120
则x=
700000×0.005×(1+0.005)120
(1+0.005)120−1=7875(元).
答:每月应还贷7875元.
(2)卖房人共付给银行7875×120=945000元,
利息945000-700000=245000(元),
缴纳差额税(1500000-1000000)×0.2=100000(元),
获利500000-(245000+100000)=155000(元).
答:卖房人将获利约155000元.