n=123456789
x-n+n=987654321
x=987654321
x + 123456789 - 123456789 = 987654321
x = 987654321 + 123456789 - 123456789
x = 987654321
Duyệt mình nha
x+123456789-123456789= 987654321
x + 0 = 987654321
x = 987654321
Ai tích mk mk tích lại
x + 123456789 - 123456789 = 987654321
x + 123456789 = 987654321 + 123456789
x + 123456789 = 1111111110
x = 1111111110 - 123456789
x = 987654321
x + 123456789 - 123456789 = 987654321
x + 123456789 = 987654321 + 123456789
x + 123456789 =1111111110
x = 1111111110 - 123456789
x = 987654321
x=987654321-(123456789*2)
x=987654321-246913578
x=740740743