答案
解:(1)根据题意得:
15+(3×5-1×4+s×我+1×5)÷s5
=15+(15-4+1s+5)÷s5
=15+s8÷s5
=15+1.4
=11.4(元);
(s)根据题意得:3×5-1×4+s×我+1×5=15-4+1s+5=s8(元),
则(15-8)×s5+s8=我8(元),即赚了我8元.
解:(1)根据题意得:
15+(3×5-1×4+s×我+1×5)÷s5
=15+(15-4+1s+5)÷s5
=15+s8÷s5
=15+1.4
=11.4(元);
(s)根据题意得:3×5-1×4+s×我+1×5=15-4+1s+5=s8(元),
则(15-8)×s5+s8=我8(元),即赚了我8元.