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Solve for x (complex solution)
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Solve for x
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3x-21=-21+3x
Use the distributive property to multiply 3 by x-7.
3x-21-3x=-21
Subtract 3x from both sides.
-21=-21
Combine 3x and -3x to get 0.
\text{true}
Compare -21 and -21.
x\in \mathrm{C}
This is true for any x.
3x-21=-21+3x
Use the distributive property to multiply 3 by x-7.
3x-21-3x=-21
Subtract 3x from both sides.
-21=-21
Combine 3x and -3x to get 0.
\text{true}
Compare -21 and -21.
x\in \mathrm{R}
This is true for any x.