Question

решите уравнение 400-x=275+25

Answer 1

400-х=275+25                                                                                                        400-х=300                                                                                                              х=400-300                                                                                                              х=100

Answer 2

400-x=275=25
400-x=300
x=400-300
x=100
______________
400-100=300
Удачи!