Question

（X×0.8-1000）÷1000=10%怎么算?

Answer 1

（X×0.8-1000）÷1000=10%

1000×（X×0.8-1000）÷1000=1000×10%

X×0.8-1000=100

X×0.8-1000+1000=100+1000

X×0.8=1100

X×0.8÷0.8=1100÷0.8

X=1100÷0.8

X=1375