827-х=315
-х=315-827
-х=-512
х=512
x + 56 = 100 – 24
x = – 24 + 100 – 56
x = 20
54 + x = 12 + 65
x = 65 + 12 – 54
x = 23
827-х=315
-х=315-827
-х=-512
х=512
x + 56 = 100 – 24
x = – 24 + 100 – 56
x = 20
54 + x = 12 + 65
x = 65 + 12 – 54
x = 23