Question

реши уравнения . 20.007-x=20.000, x-900=1.000, x+200=3.200
, 300+ x=5.400

Answer 1

1)7. 2)1900. 3)3000. 4)5100

Answer 2

1)-х=20000-20007
-x=-7
x=7
2)x=1000+900
x=1900
3)x=3200-200
x=3000
4)x=5400-300
x=5100