Question

x+999=1000
x-385=401
500+x=1000

Answer 1

Ответ:

x+999=1000

x=1000-999

x=1

x-385=401

x=401+385

x=786

500+x=1000

x=1000-500

x=500

Answer 2

x=1000-999
x=1

x=401+385
x=786

x=1000-500
x=500