Since 9<span> does not contain the </span>variable<span> to solve for, move it to the right-hand side of the </span>equation<span> by subtracting </span>9<span> from both sides. </span><span>2x=−9+18
</span>Add <span>−9</span><span> and </span>18<span> to get </span><span>9. </span><span>2x=9
</span>Divide<span> each </span>term<span> in the </span>equation<span> by </span><span>2. </span><span>x=<span>9/2
</span></span>Exact Form: <span>9/2</span>
<span>Decimal Form: </span> 4.5
<span>Mixed Number Form: </span> <span>4 <span>1/2</span></span>