Решите уравнения.
7x+2x=27 7x-5x=70 x+123=562
16x-4x=60 4x+12x=20+12 621-x=235
7x+2x=27 7x-5x=70 x+123=562
16x-4x=60 4x+12x=20+12 621-x=235
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Пошаговое объяснение:
7х+2х=27
9х=27
Х=27:9
Х=3
7х-5х=70
2х=70
Х=70:2
Х=35
Х+123=562
Х=562-123
Х=439
16х-4х=60
12х=60
Х=60:12
Х=5
4х+12х=20+12
16х=32
Х=32:16
Х=2
621-х=235
-х=235-621
-х= - 386
Х=386