Solve for x
x=-420
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0x\times 8=420+x
Multiply 14 and 0 to get 0.
0x=420+x
Multiply 0 and 8 to get 0.
0=420+x
Anything times zero gives zero.
420+x=0
Swap sides so that all variable terms are on the left hand side.
x=-420
Subtract 420 from both sides. Anything subtracted from zero gives its negation.
Examples
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Matrix
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Simultaneous equation
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Limits
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