Question

реши уравнения х-320=480 260+х=480 450-х=170

Answer 1

1)х-320=480

х=480+320

х=800

2)260+х=480

х=480-260

х=220

3)450-х=170

450-170=х

280=х

х=280

Answer 2

х-320=480
х=480+320
х=800
800-320=480

260+х=480
х=480-260
х=220
260+220=480

450-х=170
х=450-170
х=280
450-280=170