Question

х-407=213, x= , x= . 123+x=257 , x= , x= . x-274=701 , x= , x= .

Answer 1

x=407+213=620  x=620,
x=257-123=134 x=134,
x=701+274=134 x=975

Answer 2

407-213=194, 253-123=134,701-274=427,