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A, B, C, D, times, 4, equals, D, C, B, A
Solve for A
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Solve for B
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ABCD\times 4-DCBA=0
Subtract DCBA from both sides.
3ABCD=0
Combine ABCD\times 4 and -DCBA to get 3ABCD.
3BCDA=0
The equation is in standard form.
A=0
Divide 0 by 3BCD.
ABCD\times 4-DCBA=0
Subtract DCBA from both sides.
3ABCD=0
Combine ABCD\times 4 and -DCBA to get 3ABCD.
3ACDB=0
The equation is in standard form.
B=0
Divide 0 by 3ACD.