Solve for x
x\neq 4
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2\times 9=18
Variable x cannot be equal to 4 since division by zero is not defined. Multiply both sides of the equation by 2\left(x-4\right), the least common multiple of x-4,2\left(x-4\right).
18=18
Multiply 2 and 9 to get 18.
\text{true}
Compare 18 and 18.
x\in \mathrm{R}
This is true for any x.
x\in \mathrm{R}\setminus 4
Variable x cannot be equal to 4.
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